. "Catalysis of the reaction: protein-L-asparagine + H2O = protein-L-aspartate + NH3. This reaction is the deamidation of an N-terminal asparagine residue in a peptide or protein." . . "protein-N-terminal asparagine amidohydrolase activity" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .