6EMI:
reference: Bacterial Expression of Human Butyrylcholinesterase as a Tool for Nerve Agent Bioscavengers Development., Brazzolotto X, Igert A, Guillon V, Santoni G, Nachon F, Molecules. 2017 Oct 27;22(11). pii: E1828. doi: 10.3390/molecules22111828. PMID: 29077024

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