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Custom Peptide Synthesis

ONTORES provides highest quality peptide synthesis services with a success rate well above the industry standard (>98%). Since our inception in 2009, we have produced more than 100,000 customized peptides for the biomedical research community, biotechnology, and pharmaceutical companies and have consistently met the highest peptide standards in terms of quality, service, and technical capability.

With over 5 years of strong peptide synthesis and research experience, we have developed highly specific expertise to synthesize with various types of modified and difficult peptides. With a diverse range of modifications available for peptides, we routinely meet our clients' specifications with unusual, custom made peptides.

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  • Highest quality at the most competitive pricing
  • High Success Rate >98%
  • Fast Delivery Time: 2-3 weeks
  • Synthesis up to 100 amino acid residue
  • Quantity from mg to kg
  • Different Purity Level: Crude, desalted, >70%, >75%, >80%, >85%, >90%,>95%, >98% and >99%
  • MS , HPLC, Certificate of Analysis and Route of Synthesis can be provided every lot of peptide order
  • Variety of Modifications available from us


Peptides are natural biological or artificially manufactured short chains of amino acid monomers linked by peptide bonds. Peptides occur in biology in many forms such as dipeptides, cyclic peptides or phosphopeptides. The function of peptides as hormones, growth factors, ion channel ligands, neurotransmiters, and immune system components in biological systems is the basis of one method of peptide classification.

Peptides Complications

  • Epitope mapping
  • Antibody-antigen interactions
  • Monoclonal and polyclonal antibody production
  • Enzyme specificity and enzymatic mechanisms
  • Biological effects of defined peptides
  • Blocking and competition assays of proteases
  • Non-quantitative enzyme-substrate studies
  • Immunization and quantitative receptor-ligand interactions
  • ELISA standards for measuring titers of antibodies
  • and more.

Quality Assurance

ONTORES provides a comprehensive analytical datasheet and corresponding raw data as documentation with your custom peptides. The documentation is carefully checked and archived before leaving production facilities. The appearance, quantity, molecular weight, and purity of each peptide will be included in the certificate of analysis report. All documents would be shipped to you within your order package or send to you by email.
Our ISO 9001:2015 certified, Total Quality Management (TQM) platform ensures that each custom peptide is checked via LC-MS with ion trap, quadrupole or TOF detection, MALDI-MS or HPLC at each stage of the purification process for maximum peptide fidelity. Optional peptide analyses can be ordered with each synthesis of peptides and include:
  • AAA (amino acid analysis)
  • NMR (nuclear magnetic resonance)
  • Residual Solvent Determination
  • Water Determination
  • Peptide Content Determination
  • Stability Testing
  • Solubility Testing
  • Bacterial Endotoxin Determination
  • and more.

Packing and Delivery

Your peptides will arrive as lyophilized powder in vials requested with the blue ice package for preservation in delivery.
Every item is shipped based on the best shipping method assessed for specific requirements of our products. We ship your order by DHL or FedEx. For each package, the shipping cost is 60USD. You will receive confirmation of your shipping costs before your order shipped. After the package is scheduled to ship, ONTORES will email our client the tracking number.

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