3SC2:
reference: Refined atomic model of wheat serine carboxypeptidase II at 2.2-A resolution., Liao DI, Breddam K, Sweet RM, Bullock T, Remington SJ, Biochemistry 1992 Oct 13;31(40):9796-812. PMID: 1390755

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