1OCL:
reference: Characterization of a novel Ser-cisSer-Lys catalytic triad in comparison with the classical Ser-His-Asp triad., Shin S, Yun YS, Koo HM, Kim YS, Choi KY, Oh BH, J Biol Chem. 2003 Jul 4;278(27):24937-43. Epub 2003 Apr 23. PMID: 12711609

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