3.4.11.6 release of N-terminal Arg and Lys from oligopeptides when P1' is not Pro. Also acts on arylamides of Arg and Lys - 3.4.11.6 release of N-terminal Arg and Lys from oligopeptides when P1' is not Pro. Also acts on arylamides of Arg and Lys exopeptidase, no endoprotease activity, the enzyme is strictly specific for the removal of N-terminal basic residues from peptides and proteins, no activity with substrates possessing Pro at the P1 position 3.4.11.6 release of N-terminal Arg and Lys from oligopeptides when P1' is not Pro. Also acts on arylamides of Arg and Lys exopeptidase, the enzyme is strictly specific for the removal of N-terminal basic residues from peptides and proteins, no activity with substrate possessing Pro at the P1 position 3.4.11.6 release of N-terminal Arg and Lys from oligopeptides when P1' is not Pro. Also acts on arylamides of Arg and Lys exopeptidase, the enzyme is strictly specific for the removal of N-terminal basic residues from peptides and proteins, no activity with substrates possessing Pro at the P1 position