3SGA:
reference: Structures of product and inhibitor complexes of Streptomyces griseus protease A at 1.8 A resolution. A model for serine protease catalysis., James MN, Sielecki AR, Brayer GD, Delbaere LT, Bauer CA, J Mol Biol 1980 Nov 25;144(1):43-88. PMID: 6783761

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).