2REN:
reference: Structure of recombinant human renin, a target for cardiovascular-active drugs, at 2.5 A resolution., Sielecki AR, Hayakawa K, Fujinaga M, Murphy ME, Fraser M, Muir AK, Carilli CT, Lewicki JA, Baxter JD, James MN, Science 1989 Mar 10;243(4896):1346-51. PMID: 2493678

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