An active-site titrant for chymotrypsin, and evidence that azapeptide esters are less susceptible to nucleophilic attack than ordinary esters
作者:Jill M. Gassman、Joe Magrath
DOI:10.1016/0960-894x(96)00308-3
日期:1996.8
The p-nitrophenyl ester of N-methoxycarbonylazaphenylalanine reacts with chymotrypsin in 1:1 stoichiometry, and the enzyme concentration can be quantified from the absorbance of the p-nitrophenolate produced in the reaction. This azapeptide does not decompose at pH 7 in the presence or absence of 1 mM hydroxylamine. Copyright (C) 1996 Elsevier Science Ltd