Guides
Know what the numbers mean.
Plain explanations of how peptides are tested, stored and described, written so you can judge any supplier’s claims, including ours.
Articles
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Reading a certificate of analysis
What each line on a peptide certificate means, and the four checks worth making before you trust it.
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What HPLC purity means, and doesn’t
Peak areas, wavelengths and the difference between purity and net peptide content.
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Mass spectrometry and identity
How a mass spectrum confirms a peptide is what its label says, and the limits of that confirmation.
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Storing and handling lyophilized peptides
Temperature, moisture, light and solvents: general laboratory practice for keeping peptides intact.
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Reading a helical wheel
How to read the wheel diagram in Sequence Studio, and what it can and can’t tell you.
Reference
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Amino acid reference
Masses, formulas, hydropathy and side-chain pKa for every residue, in a sortable table.
Free lab tools
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Sequence Studio
Formula, mass, isoelectric point (pI) and hydropathy for any sequence, with a helical-wheel view.
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Solution Calculator
Concentration, molarity and dilution arithmetic for the bench.