1Y10:
reference: The structure of a pH-sensing mycobacterial adenylyl cyclase holoenzyme., Tews I, Findeisen F, Sinning I, Schultz A, Schultz JE, Linder JU, Science 2005 May 13;308(5724):1020-3. PMID: 15890882

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