1ARC:
reference: The primary structure and structural characteristics of Achromobacter lyticus protease I, a lysine-specific serine protease., Tsunasawa S, Masaki T, Hirose M, Soejima M, Sakiyama F, J Biol Chem 1989 Mar 5;264(7):3832-9. PMID: 2492988

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