... the inhibitor of acrosin – the major protease of mammalianspermatozoa – from the crab-eating monkey, Macacafascicularis (Table 1).Whereas many Kazal inhibitors have proline at P2, onlytwowerereportedtohaveprolineatP1[43,44]. ... interaction with theirmembranes.Materials and methodsMaterialsAll chemicals were of the purest analytical grade available.Proteases, aprotinin, lysozyme, and a- casein were from Sigma-Aldrich. ... PSKP-1 and PSKP-2, twovariants of a new protein isolated from the skin of the anuran, P. sauvagii, whose sequence indicates membership of the Kazal family. Most members of this family are smallprotein...