Tools
Peptide science tools
Free calculators and reference data. Everything runs in your browser.
Calculator
Peptide mass calculator
Monoisotopic and average mass, formula, ESI m/z values, net charge, pI and extinction coefficient from a sequence.
Reference
Amino acid reference table
Codes, residue masses, side-chain pKa and hydropathy for the 20 standard amino acids.
Reference
Glossary
Plain-English definitions of peptide science terms, linked to the full articles.