3HJ0:
reference: Chemoselective small molecules that covalently modify one lysine in a non-enzyme protein in plasma., Choi S, Connelly S, Reixach N, Wilson IA, Kelly JW, Nat Chem Biol. 2010 Feb;6(2):133-9. PMID: 20081815

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