5KD1:
reference: Nitrosoamphetamine binding to myoglobin and hemoglobin: Crystal structure of the H64A myoglobin-nitrosoamphetamine adduct., Wang B, Powell SM, Guan Y, Xu N, Thomas LM, Richter-Addo GB, Nitric Oxide. 2017 Apr 24;67:26-29. doi: 10.1016/j.niox.2017.04.012. PMID: 28450187

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