1E12:
reference: Structure of the light-driven chloride pump halorhodopsin at 1.8 A resolution., Kolbe M, Besir H, Essen LO, Oesterhelt D, Science. 2000 May 26;288(5470):1390-6. PMID: 10827943

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