1C9N:
reference: Engineered Bacillus lentus subtilisins having altered flexibility., Graycar T, Knapp M, Ganshaw G, Dauberman J, Bott R, J Mol Biol 1999 Sep 10;292(1):97-109. PMID: 10493860

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