Abstract
A sensitive precise pH-stat assay for peptidases is described. The Michael is parameters for a number of substrates of leucine aminopeptidase have been measured. Leucine aminopeptidase hydrolyses L-leucine benzyl ester at one-quarter the rate of L-leucine amide. Leucine aminopeptidase is inhibited by glycerol and butanol, and the dissociation constants of the alcohol complexes of the enzyme and of the enzyme-substrate complex have been computed.