Aminopeptidases A, B, and N and Dipeptidase D Are the Four Cysteinylglycinases of Escherichia coli K-12

Abstract
Aminopeptidases A, B, and N and dipeptidase D, with broad substrate specificity, are the four cysteinylglycinases of Escherichia coli K-12, and there is no peptidase specific for the cleavage of cysteinylglycine.