3VPT:
reference: Crystal structure of a Bombyx mori sigma-class glutathione transferase exhibiting prostaglandin E synthase activity., Yamamoto K, Higashiura A, Suzuki M, Aritake K, Urade Y, Uodome N, Nakagawa A, Biochim Biophys Acta. 2013 Jun;1830(6):3711-8. doi: 10.1016/j.bbagen.2013.02.021., Epub 2013 Mar 1. PMID: 23458683

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