[The peptidase activity of a cellular extract of the causative agent of plague].

Peptidase activity of Yersinia pestis cell extract was studied by the hydrolysis of synthetic and some natural substrates, as well as the hydrolysis of fluorogenic aminopeptidase substrates. All peptides and fluorogenic substrates under test were split by Y. pestis cell extract, the splitting of alanylaminopeptidase substrate being linked with at least two enzymes of this cell extract.