Molar extinction coefficient (280 nm)

ext_coeff_280 · Sequence-derived · unit: M^-1 cm^-1

ε280 (reduced) = 5500·nTrp + 1490·nTyr. Cystine-bonded form (+125 per disulfide) and A280(0.1%, 1 g/L) carried in payload. Exact match vs BioPython.

Computed value — a deterministic descriptor validated against independent reference implementations; not an experimental measurement, and it carries no evidence support-class. Computed from the standard parent-residue sequence (a protein-origin metric, defined at any length). Not available for modified or non-standard sequences.

• Peptides
  18,184
• Min
  0 M^-1 cm^-1