Peptides Calculator
Enter peptide sequence (single-letter amino acid codes) and optional parameters.
Results
Extinction Coefficient (M⁻¹cm⁻¹) Formula: MW = sum of residue weights + water weight (18.02). Ext. coeff = Trp*5500 + Tyr*1490 + Cystine*125. Concentration = (Abs * MW) / (Ext * pathlength).