6YII:
reference: Crystal structure of a Class III adenylyl cyclase-like ATP-binding protein from Pseudomonas aeruginosa., Linder J, Hupfeld E, Weyand M, Steegborn C, Moniot S, J Struct Biol. 2020 May 23:107534. doi: 10.1016/j.jsb.2020.107534. PMID: 32454240

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