1YBT:
reference: Origin of asymmetry in adenylyl cyclases: structures of Mycobacterium tuberculosis Rv1900c., Sinha SC, Wetterer M, Sprang SR, Schultz JE, Linder JU, EMBO J 2005 Jan 27;. PMID: 15678099

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