Vacuoles are not the sole compartments of proteolytic enzymes in yeast

Abstract
Localization in vacuoles, the lysosome‐like organelle of yeast, was checked for several newly detected proteolytic enzymes. While aminopeptidase Co and carboxypeptidase S were found in vacuoles, proteinase D and proteinase E as well as a variety of other proteolytic activities detectable with the aid of chromogenic peptide substrates do not reside in this cell compartment.