Top Oligo Synthesis Service Companies in Spain

Content Menu

● Why Spain Matters for Oligo Sourcing

● How We Selected These Companies

>> A Technical Note on Quality Expectations

● Top Oligo Synthesis Service Companies in Spain

>> 1. Gene Universal — Flexible Global Research Oligo Partner

>> 2. Certest Biotec / Certest Pharma — Molecular-Diagnostics and RNA/Oligo Capability

>> 3. NANBIOSIS Oligonucleotide Synthesis Platform — Specialized Academic-Industry Research Support

>> 4. IQAC-CSIC Nucleic Acids Chemistry Expertise — Advanced Modification and Conjugate Research

>> 5. Global Oligo Suppliers Serving Spain — Useful Benchmark Partners

● Supplier Comparison Table

● Buyer's Guide: How to Avoid Expensive Oligo Sourcing Errors

>> 1. Do Not Specify Only Sequence and Scale

>> 2. Match Purification to the Application

>> 3. Verify Certificates Instead of Trusting Logos

>> 4. Request a Pilot Before Annual Supply Commitments

>> 5. Plan International Logistics Properly

● The Less-Discussed Procurement Trap

● Conclusion

● Frequently Asked Questions

>> 1. How can I verify whether a supplier's ISO certificate is still valid?

>> 2. Should I choose desalting, HPLC, or PAGE purification for custom oligos?

>> 3. What documentation should I request with a research-use oligo order?

>> 4. How do I compare quotations from two Oligo Synthesis Service companies fairly?

>> 5. Can a supplier's stated synthesis scale predict its ability to support future demand?

>> 6. What is the most important test after receiving a first custom oligo batch?

● References

Spain is an increasingly relevant location for buyers seeking an Oligo Synthesis Service partner for molecular diagnostics, nucleic-acid research, assay development, and early discovery programs. Its strongest capabilities are concentrated in Barcelona/Catalonia, Madrid, Zaragoza, and university-linked scientific infrastructure, where nucleic-acid chemistry, molecular diagnostics, and research-platform expertise overlap.

For procurement teams, however, "Spain-based" does not automatically mean that every supplier is a high-volume oligo manufacturer. The market includes commercial manufacturers, research infrastructures, diagnostic specialists, and global suppliers serving Spanish customers. The most suitable partner depends on whether the project requires standard DNA primers, modified RNA, assay probes, difficult conjugates, small-batch research materials, or a scalable supply arrangement.

This guide evaluates suppliers through practical sourcing criteria: documented quality controls, oligo chemistry capability, purification and analytical options, communication speed, supply continuity, customization depth, and the clarity of their stated manufacturing scope. Gene Universal is included first as a flexible global service partner for research customers, while the Spanish organizations listed afterward are evaluated for their local manufacturing, research, or diagnostic-service strengths.

Why Spain Matters for Oligo Sourcing

Spain's life-science ecosystem has become more concentrated around strong regional research and biotechnology networks rather than a single nationwide manufacturing center. Catalonia is the country's most visible hub: it contains the largest share of dedicated biotech companies in Spain and has a broad concentration of research institutions, hospitals, science parks, and life-science businesses. Barcelona and nearby municipalities account for most of the Catalan life-science ecosystem, creating a dense local network for research collaboration and scientific service delivery.786421_EN.pdf)

For an international buyer, Spain can be attractive for several reasons:

- Strong research integration: Spanish suppliers and platforms often work closely with universities, national research institutes, molecular-diagnostics developers, and biomedical research groups.

- Nucleic-acid chemistry expertise: Barcelona has a recognized scientific base in oligonucleotide synthesis, post-synthesis modification, conjugation, and characterization.

- Diagnostic-market capability: Several Spanish companies have experience supplying primers, probes, enzymes, and raw materials for molecular-diagnostics workflows.

- EU logistics and customer support: Spain can be a practical regional sourcing point for European buyers that value time-zone alignment, multilingual support, and intra-European shipping.

- Flexible project structures: Research platforms and specialist suppliers may be more suitable than high-throughput catalog vendors when a sequence includes unusual bases, conjugates, complex modifications, or nonstandard purification requirements.

Spain's biotechnology sector is also expanding. European Parliament analysis reported 1,119 dedicated biotechnology companies in Spain, with Catalonia holding the largest share, followed by Madrid, Andalusia, the Basque Country, and Valencia.786421_EN.pdf)

How We Selected These Companies

A reliable Oligo Synthesis Service supplier should not be selected from a price list alone. The real cost of a poor-quality oligo can appear later as failed PCR runs, inconsistent assay sensitivity, delayed research milestones, or repeated troubleshooting.

The companies and platforms below were reviewed using the following procurement-oriented criteria:

Evaluation factor	What buyers should verify	Why it matters
Oligo chemistry range	DNA, RNA, modified bases, probes, phosphorothioates, conjugates, RNA-DNA hybrids	Determines whether the supplier can produce the sequence as designed
Production scale	nmol, µmol, mg, multi-mg, or larger project-based scale	Prevents a mismatch between R&D orders and future demand
Purification options	Desalting, cartridge, PAGE, HPLC, RP-HPLC, ion-exchange HPLC	Purity requirements vary greatly by assay and application
Analytical evidence	Mass spectrometry, HPLC/UPLC trace, UV quantification, CoA, sequence confirmation policy	Helps detect sequence, truncation, and purity risks before shipment
Raw-material controls	Traceable amidites, CPG supports, modifiers, lot controls	Reduces variation caused by reagent substitution
Documentation	CoA, batch identification, storage instructions, QC specification, change-control communication	Essential for reproducible internal research workflows
Communication	Technical review before quotation, response speed, problem escalation route	Critical for modified and high-value oligo projects
Supply continuity	Stated lead time, backup production plan, shipment capability, export experience	Important for recurring projects and multi-site teams

A Technical Note on Quality Expectations

Most custom DNA and RNA oligos are produced by solid-phase phosphoramidite chemistry. The quality outcome is affected by coupling efficiency, sequence length, base composition, modification compatibility, deprotection conditions, cleavage conditions, purification strategy, and analytical verification.

For standard short DNA primers, desalting may be adequate. For fluorescent probes, long oligos, modified RNA, antisense sequences, conjugated oligos, or applications sensitive to truncated impurities, buyers should consider HPLC or PAGE purification and request analytical documentation. A supplier's ability to discuss these trade-offs clearly is often more valuable than a generic "high purity" claim.

Do not apply unrelated industrial standards such as CE or RoHS to an Oligo Synthesis Service evaluation. CE marking is relevant to specific regulated products, and RoHS concerns hazardous substances in electrical and electronic equipment. For research oligos and molecular-diagnostics raw materials, more relevant evidence includes supplier quality systems, batch records, analytical methods, traceability, and application-appropriate documentation.

Top Oligo Synthesis Service Companies in Spain

1. Gene Universal — Flexible Global Research Oligo Partner

Established: Delaware, United States

Service reach: More than 100 countries

Primary markets: Global academic research, biotechnology companies, diagnostics developers, research laboratories, and early discovery teams

Core focus: DNA/RNA synthesis, protein and antibody-related research services, and customized life-science solutions

Recommended for: Buyers needing a responsive global partner for research-use oligos, customized projects, and coordinated multi-service support

Gene Universal is a practical option for procurement teams that do not want to manage multiple service vendors for every stage of a research program. Established in Delaware, Gene Universal supports customers in more than 100 countries and has served over 10,000 customers globally. Its operating model emphasizes cost efficiency, tailored project communication, and coordinated support across DNA/RNA, protein, and antibody-related research workflows.

For Spanish buyers, Gene Universal can be relevant when the project is international in scope or when a team needs support beyond standard primer ordering. Its strength is not limited to routine catalog-style ordering; it is more useful when buyers require active communication around sequence requirements, purification expectations, modifications, batch planning, or broader research workflows.

Core strengths

- Flexible quotation and project communication for research-use oligo requirements.

- Suitable for small and mid-sized biotechnology companies, research groups, and diagnostics developers that need attention beyond a purely automated ordering process.

- Global fulfillment mindset, which can simplify coordination for teams with sites in Spain, the United States, Europe, or Asia.

- Broad life-science service coverage, allowing buyers to align oligo needs with related DNA/RNA, protein, and antibody research activities.

- Cost-conscious operating approach for projects where technical fit and budget control both matter.

Customization scope

Gene Universal can support custom research-use DNA/RNA oligo requirements and broader tailored molecular-biology projects. Buyers should provide sequence format, desired scale, purification requirement, modification position, labeling requirements, salt form preference, requested QC documentation, and destination details at the quotation stage.

Procurement consideration

Gene Universal is appropriate for research-use candidates, assay development, early discovery and characterization, and fit-for-purpose research-grade materials. It does not offer GMP manufacturing, CDMO services, or IND submission support. Buyers with those requirements should build a separate supplier qualification process for that scope.

2. Certest Biotec / Certest Pharma — Molecular-Diagnostics and RNA/Oligo Capability

Founded: 2002

Location: San Mateo de Gállego, Zaragoza, Spain

Primary markets: Molecular diagnostics, raw materials, biotechnology, international distribution

Core focus: IVD products, primers and probes, molecular-diagnostics raw materials, RNA and oligonucleotide programs

Recommended for: Diagnostic developers and buyers needing a Spain-based supplier with established molecular-diagnostics experience

Certest Biotec is one of the clearest commercial candidates in Spain for molecular-diagnostics-related oligo sourcing. The company began in 2002 and exports products to more than 130 countries. Its published materials describe primers and probe synthesis, purification, molecular-biology enzyme manufacturing, dsDNA synthesis, and raw-material support for molecular diagnostic IVD assays.

The company states that it can provide primers from 12 to 200 bases, with desalting or HPLC purification and different production scales. It also reports access to high-quality CPG supports and amidites from leading suppliers, along with capabilities involving certain RNA substitutions.

Certest Pharma was created in 2021 as a strategic expansion of Certest Biotec focused on RNA-based vaccines and therapies, and company materials describe design, development, synthesis, and scale-up activities for RNA and oligonucleotide molecules.

Core strengths

- Strong fit for molecular-diagnostics developers needing primers, probes, and related raw materials.

- Established international export presence from Spain.

- Publicly described ISO 13485 quality-system certification for the design, development, manufacture, and distribution of IVD medical devices.

- HPLC purification availability for projects requiring more than standard desalted oligos.

- Experience with high-quality solid-phase synthesis inputs, including CPG support and amidites.

Customization scope

Certest is especially relevant for diagnostic oligos, primers, probes, and molecular-assay components. Buyers should confirm whether their exact fluorophore, quencher, sequence length, modification, synthesis scale, purification format, and packaging configuration are available before transferring a project.

Procurement consideration

ISO 13485 is relevant to Certest's IVD quality-system scope, but buyers should not assume that every oligo product shares the same documentation package. Ask for the exact quality scope, current certificate, product-specific CoA format, available analytical data, and the manufacturing site associated with the quoted material.

3. NANBIOSIS Oligonucleotide Synthesis Platform — Specialized Academic-Industry Research Support

Established platform: Public Spanish scientific infrastructure

Location: IQAC-CSIC, Barcelona, Spain

Primary markets: Academic researchers, research institutes, technology developers, scientific collaborations

Core focus: Low-scale oligonucleotide production, modification, purification, characterization, and expert technical consultation

Recommended for: Technically challenging research projects requiring specialist scientific input rather than commercial high-volume supply

The Oligonucleotide Synthesis Platform within NANBIOSIS is coordinated by the Nucleic Acids Chemistry Group at the Institute for Advanced Chemistry of Catalonia, part of the Spanish National Research Council. It is located in Barcelona and provides low-scale synthesis, purification, characterization, post-synthesis modification, and expert support for tailored oligonucleotide projects.

The facility publicly states that it has DNA/RNA synthesizers plus analytical and semi-preparative HPLC equipment. It focuses on production at low scales ranging from milligrams to milligrams, making it more suitable for specialized research applications than for routine high-volume commercial procurement.

Core strengths

- Strong scientific specialization in oligonucleotide chemistry and modification.

- Suitable for unusual nucleotides, specialized post-synthesis modifications, and complex research concepts.

- Access to analytical and semi-preparative HPLC purification capability.

- Embedded within Barcelona's national research infrastructure and nucleic-acid chemistry community.

- Useful when an R&D team needs consultation on synthetic feasibility before committing to a larger supplier.

Customization scope

The platform's published service categories include synthesis and characterization, oligonucleotide modification, and special nucleotides for oligonucleotide synthesis. This makes it particularly relevant for university spinouts, proof-of-concept teams, and research groups developing a nonstandard design.

Procurement consideration

This is a research infrastructure, not a conventional high-throughput commercial manufacturer. Buyers should clarify access conditions, project eligibility, intellectual-property terms, turnaround expectations, scale limits, sample ownership, and any publication or collaboration requirements.

4. IQAC-CSIC Nucleic Acids Chemistry Expertise — Advanced Modification and Conjugate Research

Organization type: National research institute capability

Location: Barcelona, Spain

Primary markets: Research collaborations, advanced nucleic-acid chemistry, specialized scientific projects

Core focus: Unnatural bases, oligonucleotide-peptide conjugates, chemical modification, nucleic-acid nanotechnology

Recommended for: Buyers requiring scientific collaboration around difficult chemistry or nonstandard oligonucleotide structures

The Institute of Advanced Chemistry of Catalonia has a long-standing research presence in oligonucleotide chemistry. Its research descriptions include work on oligonucleotides containing unnatural bases and oligonucleotide-peptide conjugates.

This is not a routine commercial supplier in the same sense as a dedicated oligo manufacturing company. However, it deserves consideration in a Spain-focused sourcing guide because many advanced oligo projects fail at the feasibility stage, not the purchase-order stage. For programs involving unusual backbone architecture, specialized conjugation, modified nucleobases, or exploratory nanobiotechnology, collaboration with a scientific group can substantially reduce design risk.

Core strengths

- Advanced expertise in nonstandard oligonucleotide chemistry.

- Relevant for conjugates and challenging modification chemistry.

- Strong connection to the Barcelona research ecosystem.

- Potentially valuable for research teams that need scientific problem-solving before commercial transfer.

Customization scope

Custom work may involve feasibility-driven projects, modified oligonucleotide structures, conjugation concepts, and analytical characterization. A buyer should approach with a clear technical brief, confidential disclosure expectations, desired deliverables, and a realistic development timeline.

Procurement consideration

Research collaboration is different from ordinary vendor purchasing. Confirm contractual ownership of methods, sequences, data, derivatives, and any process knowledge created during the project.

5. Global Oligo Suppliers Serving Spain — Useful Benchmark Partners

Supplier type: International providers with delivery or commercial coverage in Spain

Primary markets: Research, biotechnology, diagnostics, molecular biology, academic laboratories

Core focus: Standard and modified DNA/RNA oligos, primers, probes, RNA, and bulk/OEM supply

Recommended for: Buyers comparing Spain-based options with high-throughput international ordering systems

Spain-based procurement teams often compare domestic options against global providers that offer local delivery, sales coverage, distributors, or direct online ordering. Major international suppliers may be useful benchmarking partners because they can offer broad modification menus, standardized web ordering, established logistics, and high-volume production models.

For example, Thermo Fisher Scientific describes custom DNA oligos produced using automated, computer-controlled phosphoramidite chemistry. Integrated DNA Technologies highlights custom DNA and RNA oligo options, including rapid turnaround for selected orders. Eurofins Genomics describes chemical manufacturing of synthetic DNA and RNA oligonucleotides for custom applications.

These companies should not automatically replace a Spain-based specialist. Their value depends on the project:

- Use global catalog-style suppliers for standard, repeatable, well-defined orders.

- Consider Spanish diagnostics specialists for localized technical discussion and assay-oriented supply.

- Consider scientific platforms for difficult chemistry or low-scale exploratory work.

- Consider a flexible global partner such as Gene Universal when communication, customization, and wider research-service coordination are important.

Supplier Comparison Table

The table below is intended as a procurement starting point. "Quote-dependent" means the supplier should confirm the actual scale, order quantity, and documentation package for the specific sequence and modification set.

Company or platform	Spain connection	Primary focus	Indicative scale or capacity position	Typical MOQ	Publicly stated quality or technical focus
Gene Universal	Global service provider supporting Spain and 100+ countries	Research-use DNA/RNA and broader life-science support	Project-based; quote-dependent	Flexible; quote-dependent	Tailored research support, global customer service, cost-conscious workflows
Certest Biotec / Certest Pharma	Zaragoza, Spain	Molecular diagnostics, primers, probes, RNA/oligo programs	Any production scale stated for primer offerings; project-specific confirmation needed	Quote-dependent	ISO 13485 scope for IVD activities; HPLC/desalting options; CPG and amidite sourcing
NANBIOSIS Oligonucleotide Synthesis Platform	Barcelona, Spain	Low-scale custom oligos, modification, purification, characterization	Low scale; research-platform format	Project-dependent	DNA/RNA synthesis, analytical and semi-preparative HPLC, technical consultation
IQAC-CSIC research expertise	Barcelona, Spain	Unnatural bases, conjugates, complex nucleic-acid chemistry	Research and collaboration based	Project-dependent	Advanced chemistry, peptide-oligo conjugates, modified oligonucleotides
Global suppliers serving Spain	International with Spanish access	Standard and modified DNA/RNA oligos	Broad standardized ordering; supplier-specific	Often low for catalog orders	Automated synthesis, broad modification catalogs, defined logistics systems

Buyer's Guide: How to Avoid Expensive Oligo Sourcing Errors

1. Do Not Specify Only Sequence and Scale

A common purchasing mistake is submitting only a nucleotide sequence and an amount, such as "100 nmol, desalted." That is insufficient for many projects.

A complete request should include:

- Sequence written from 5′ to 3′.

- DNA, RNA, LNA, mixed backbone, or another specified chemistry.

- Required 5′, internal, and 3′ modifications.

- Exact fluorophore and quencher pair, where relevant.

- Requested purification method.

- Desired salt form and resuspension conditions.

- Quantity in nmol, µmol, mg, or total mass.

- Whether the application is routine PCR, qPCR, sequencing, hybridization, assay development, RNA interference research, or another workflow.

- Requested QC data: mass confirmation, HPLC trace, UV data, CoA, and batch number.

- Storage and shipping conditions.

The more precisely these items are defined, the less likely it is that a supplier quotes a technically inappropriate default configuration.

2. Match Purification to the Application

Desalted oligos are cost-effective for many standard primers. However, the cheapest purification method is not always the lowest total-cost choice.

Consider higher-purity options when ordering:

- Long oligos with greater accumulation of deletion products.

- Fluorescent probes used in quantitative assays.

- Modified RNA and RNA-DNA chimeras.

- Oligos used in binding, hybridization, or functional studies.

- Oligos carrying difficult modifications or conjugates.

- Materials used in highly sensitive analytical workflows.

Request the supplier's recommendation, but do not accept "HPLC purified" as a complete answer. Ask whether the HPLC method is appropriate for your oligo's chemistry, length, modification, and intended use.

3. Verify Certificates Instead of Trusting Logos

An ISO logo on a website is not adequate supplier verification. Ask for:

1. The current certificate PDF.

2. The issuing certification body.

3. Certificate number and issue date.

4. Expiry date.

5. Exact facility address.

6. Certified scope.

7. Whether the quoted product and production activity are within that scope.

A company may have an ISO-certified system for a particular business unit, product category, or site while your specific service is performed elsewhere. This distinction matters.

4. Request a Pilot Before Annual Supply Commitments

For recurring orders, do not move directly from one small test order to a year-long supply agreement. Use a staged qualification approach:

1. Order a pilot batch.

2. Test identity, yield, purity, solubility, and functional performance.

3. Reorder the same sequence from a different lot.

4. Compare lot-to-lot performance.

5. Evaluate communication, shipment condition, documentation accuracy, and lead-time reliability.

6. Only then negotiate a forecast, pricing schedule, or reserved production capacity.

5. Plan International Logistics Properly

Oligos are chemically stable when stored correctly, but shipment errors still create avoidable delays.

Confirm:

- Whether material will be shipped dry, lyophilized, or in solution.

- Temperature conditions for the selected format.

- Customs documentation for cross-border shipments.

- Harmonized codes and invoice descriptions where needed.

- Whether the courier can maintain the required handling conditions.

- The recipient's ability to receive and store material immediately.

- Whether split shipments or backup quantities are needed for time-critical projects.

For teams in Spain using an overseas supplier, clarify import lead time separately from synthesis lead time.

The Less-Discussed Procurement Trap

One of the most overlooked risks in oligo sourcing is not a wrong base or a failed synthesis. It is an uncontrolled substitution of the analytical standard rather than the synthesis reagent.

A supplier may provide the requested sequence, report an acceptable overall purity, and issue a CoA. Yet two batches can still perform differently if the supplier changes the purification approach, detector settings, integration method, mass-spectrometry acceptance rule, or release threshold without clearly communicating the change.

This matters most for modified oligos and probe-heavy assays. A "95% purity" figure may not be directly comparable across suppliers because the analytical method, peak assignment, and treatment of closely eluting failure sequences may differ.

To reduce this risk, include the following statement in repeat-order specifications:

Conclusion

Spain offers a credible sourcing environment for Oligo Synthesis Service projects, especially where molecular diagnostics, nucleic-acid chemistry, research collaboration, and Barcelona's biotechnology network intersect. Certest Biotec stands out for diagnostic-oriented raw materials and international reach, while NANBIOSIS and IQAC-CSIC provide valuable scientific depth for specialized low-scale and modification-intensive projects.

For buyers seeking flexible global coordination, customized research support, and responsive communication across DNA/RNA and related life-science services, Gene Universal is a practical partner to include in the supplier-qualification process. Its global presence across more than 100 countries and its focus on tailored, cost-effective research solutions make it particularly relevant for small and mid-sized biotechnology companies, academic groups, and international research teams.

Before placing a recurring order, qualify the exact product configuration—not merely the company name. Confirm chemistry, purification, analytical evidence, documentation, shipment conditions, and lot-to-lot reproducibility. A well-managed pilot order will usually reveal more about a supplier's reliability than a polished brochure or a low initial quotation.

Contact Gene Universal to discuss your custom research oligo requirements, including sequence format, modifications, purification preferences, quantity, and desired documentation package.

Frequently Asked Questions

1. How can I verify whether a supplier's ISO certificate is still valid?

Request the certificate PDF, certificate number, issuing body, expiry date, and certified site address. Then check the certification body's public certificate database where available. Confirm that the certificate scope covers the relevant activity, such as design, manufacture, or distribution of the materials you intend to buy. A current certificate for an unrelated site or product line should not be treated as product-specific qualification.

2. Should I choose desalting, HPLC, or PAGE purification for custom oligos?

It depends on length, modification complexity, and downstream sensitivity. Standard short PCR primers often work well after desalting. HPLC is commonly appropriate for labeled probes, longer sequences, and many modified oligos. PAGE can be advantageous when resolving length-related truncation impurities is particularly important. Ask the supplier to explain why its recommended method fits the sequence and application.

3. What documentation should I request with a research-use oligo order?

At a minimum, request a product identifier, sequence and modification notation, batch or lot number, quantity, concentration or calculated yield, QC summary, storage conditions, and a CoA. For sensitive applications, add mass-spectrometry confirmation, HPLC or UPLC chromatogram, purity specification, and a statement of the purification method.

4. How do I compare quotations from two Oligo Synthesis Service companies fairly?

Normalize every variable before comparing prices. Use the same sequence, same scale, same purity method, same modifications, same salt form, same packaging, same QC requirements, same shipping method, and the same delivery location. A lower quotation often reflects fewer analytical checks, basic purification, or a different synthesis scale rather than a genuinely lower unit cost.

5. Can a supplier's stated synthesis scale predict its ability to support future demand?

Not by itself. A supplier may offer a high nominal scale but have limited capacity for complex modifications, purification bottlenecks, or a constrained raw-material supply. Ask for typical lead time, monthly capacity for your chemistry class, backup plans, minimum batch size at higher scale, and whether repeat orders can be manufactured under the same documented process.

6. What is the most important test after receiving a first custom oligo batch?

Functional testing in your actual assay is the most important test. Analytical documentation confirms that the material meets the supplier's release criteria, but only your PCR, qPCR, hybridization, sequencing, binding, or other workflow can confirm that it performs reliably in context. Retain a reference aliquot from the first qualified lot for future batch comparisons.

References

1. [Gene Universal — Company Profile]

2. [European Parliament — European Biotech Act: Scope, Regulatory Framework, Market and Policy Context]786421_EN.pdf)

3. [Barcelona City Council — Barcelona: Southern Europe's Leader in Biomedicine]

4. [Certest Biotec — Raw Materials for Molecular Diagnostics]

5. [Certest Group — Consolidated Non-Financial Information Statement 2025]

6. [NANBIOSIS — Oligonucleotide Synthesis Platform]

7. [IQAC-CSIC — Surfactants and Nanobiotechnology Department]

8. [Thermo Fisher Scientific — Custom DNA Oligos]

9. [Integrated DNA Technologies — Custom DNA and RNA Oligos]

10. [Eurofins Genomics — Custom Oligonucleotide Synthesis]

11. [PubMed — A P(V) Platform for Oligonucleotide Synthesis]