3.4.11.25 proteolytic modification cleavage of the Y2 BapA preprotein between the conserved residues N275 and S276 -, 708467 3.4.11.25 proteolytic modification the gene encodes a beta-peptidyl aminopeptidase (BapA) of 402 amino acids that is synthesized as preprotein with a signal sequence of 29 amino acids. The enzyme is cleaved into two subunits (residues 30 to 278 and 279 to 402) -, 708917