PepB aminopeptidase (EC 3.4.11.23, Salmonella enterica serovar Typhimurium peptidase B) is an enzyme^[1] which catalyses the following chemical reaction:

Release of an N-terminal amino acid, Xaa, from a peptide or arylamide.

Xaa is preferably Glu or Asp, but may be other amino acids, including Leu, Met, His, Cys and Gln.

• PepB+aminopeptidase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)