1F5M:
reference: Structure of the GAF domain, a ubiquitous signaling motif and a new class of cyclic GMP receptor., Ho YS, Burden LM, Hurley JH, EMBO J 2000 Oct 16;19(20):5288-99. PMID: 11032796

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