Description
Biochem/physiol Actions A serine protease that hydrolyzes peptide bonds with aromatic or large hydrophobic side chains （Tyr, Trp, Phe, Met） on the carboxyl end of the peptide bond.
Other Notes View more information on chymotrypsin at www.sigma-aldrich.com/enzymeexplorer
Preparation Note Derived from New Zealand-sourced pancreas.
Unit Definition One unit will hydrolyze 1.0 μmole of BTEE per min at pH 7.8 at 25 °C.

Properties
type Type II
form essentially salt-free, lyophilized powder
mol wt mol wt 25,656 Da by calculation
purified by 6× crystallization
foreign activity α-chymotrypsin ≤1 unit/mg （prior to activation by trypsin）
storage temp. −20°C

Safety
Personal Protective Equipment Eyeshields, Gloves, type N95 （US）, type P1 （EN143） respirator filter
Safety Statements 22-24/25
WGK Germany 3