PepB aminopeptidase (, Salmonella enterica serovar Typhimurium peptidase B) is an enzyme 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.
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