Custom Peptide Synthesis Services for Biotech Companies: What to Expect

Custom peptide synthesis services are essential for biotech companies developing novel therapeutics, diagnostics, and research tools. Unlike catalog peptides, custom synthesis allows for tailored sequences, modifications, and scales to meet specific project needs. This article outlines what biotech companies should consider when selecting a custom peptide synthesis partner.

The first step in custom synthesis is defining the peptide sequence and any required modifications. Common modifications include phosphorylation, acetylation, amidation, and conjugation to dyes, biotin, or carrier proteins. These modifications can affect peptide stability, activity, and detection. Suppliers should have expertise in a wide range of modifications and be able to advise on potential challenges.

Synthesis scale is another consideration. Custom peptides can be produced from milligrams to kilograms. Early-stage research often requires small scales, while preclinical and clinical development may need larger batches. Suppliers should offer scalable processes and maintain quality across scales. It's important to discuss scale-up plans early to avoid delays.

Purity requirements vary by application. For research use, purity of 70-95% may suffice, while preclinical and clinical applications typically require >95% or even >98%. Suppliers should provide options for different purity levels and use appropriate analytical methods to confirm purity, such as HPLC and mass spectrometry.

Quality control for custom peptides includes sequence confirmation, purity analysis, and counterion content. Suppliers should provide a detailed certificate of analysis (COA) for each custom peptide, including the analytical data. For modified peptides, additional characterization, such as NMR or amino acid analysis, may be needed.

Timelines for custom synthesis depend on the complexity of the peptide and the supplier's capacity. Simple peptides may take 2-4 weeks, while complex or modified peptides can take longer. Biotech companies should discuss timelines upfront and establish clear milestones. Delays can impact project timelines, so it's important to choose a supplier with a proven track record.

When comparing custom peptide synthesis suppliers, evaluate their technical expertise, quality systems, and communication. Request examples of similar projects and ask for references if possible. A good supplier will collaborate closely, provide regular updates, and address any issues promptly.