6BDV:
reference: Modifications to a common phosphorylation network provide individualized control in caspases., Thomas ME, Grinshpon R, Swartz P, Clark AC, J Biol Chem. 2018 Feb 5. pii: RA117.000728. doi: 10.1074/jbc.RA117.000728. PMID: 29414778

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