Custom Peptide Synthesis

Purity should match your application. Exploratory screening may not require high purity, while quantitative assays and regulated programs often do. Share your use case and we’ll recommend a practical specification.

Yes. Difficult peptides often require tailored strategies and realistic expectations around yield and purity. See Difficult Peptide Synthesis.

Common characterization includes HPLC purity profiling and mass spectrometry identity confirmation, with additional testing available upon request. See Analytics & QC.

Yes. Many sequences are produced at research scale and later transitioned to larger or cGMP-compliant production. Early consideration of sequence complexity, modifications, and purity targets helps ensure smooth scalability.

Lead time depends on sequence length/complexity, modifications, purity target, and scale. Provide your sequence and specs and we’ll confirm an estimated ship date with your quote.

List one sequence per line and include shared specs (purity, scale, termini, labels). For larger sets, include a spreadsheet or indicate the number of sequences and length range.

Yes. For cysteine-containing sequences, specify whether you need the reduced form or oxidized (disulfide) form and any pairing requirements. Additional folding/verification options may apply.

Peptides are commonly supplied as TFA salts after HPLC. Alternative counter-ions (e.g., acetate) can be requested depending on your downstream application.

Solubility depends on sequence and counter-ion. We can advise on practical options such as salt form selection, pH, compatible solvents, and handling for hydrophobic or aggregation-prone peptides.

A typical COA includes identity confirmation (MS) and purity profiling (HPLC). Additional testing (e.g., water content, counter-ion analysis) can be added upon request.

Store lyophilized peptides sealed and dry, typically at -20°C or -80°C for long-term storage. Minimize freeze–thaw cycles by aliquoting after reconstitution.

If your application requires low endotoxin or specific handling, tell us up front. We’ll recommend the appropriate production and QC options based on your use case.

Peptide content is not an indication of peptide purity; these are two measurements. Purity is determined by HPLC and indicates the presence/absence of contaminating peptides with undesired sequences. Net peptide content only gives information on the percent of total peptide versus total non-peptide components independently of the presence of multiple peptides. Net peptide content is accurately found by performing amino acid analysis or UV spectrophotometry. This information is important when calculating concentrations of peptide during sensitive experiments.

Yes, we can conjugate peptide to oligonucleotide, small drug molecule, antibody and much more check out our Bioconjugation services