3UMJ:
reference: Improvement of Thermal Stability via Outer-Loop Ion Pair Interaction of Mutated T1 Lipase from Geobacillus zalihae Strain T1., Ruslan R, Abd Rahman RN, Leow TC, Ali MS, Basri M, Salleh AB, Int J Mol Sci. 2012;13(1):943-60. Epub 2012 Jan 17. PMID: 22312296

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