3E7B:
reference: Crystal structures of protein phosphatase-1 bound to nodularin-R and tautomycin: a novel scaffold for structure-based drug design of serine/threonine phosphatase inhibitors., Kelker MS, Page R, Peti W, J Mol Biol. 2009 Jan 9;385(1):11-21. Epub 2008 Nov 1. PMID: 18992256

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