2NSE:
reference: Crystal structure of constitutive endothelial nitric oxide synthase: a paradigm for pterin function involving a novel metal center., Raman CS, Li H, Martasek P, Kral V, Masters BS, Poulos TL, Cell 1998 Dec 23;95(7):939-50. PMID: 9875848

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