5LLY:
reference: Long-range allosteric signaling in red light-regulated diguanylyl cyclases., Gourinchas G, Etzl S, Gobl C, Vide U, Madl T, Winkler A, Sci Adv. 2017 Mar 3;3(3):e1602498. doi: 10.1126/sciadv.1602498. eCollection 2017 , Mar. PMID: 28275738

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