1EAY:
reference: Two binding modes reveal flexibility in kinase/response regulator interactions in the bacterial chemotaxis pathway., McEvoy MM, Hausrath AC, Randolph GB, Remington SJ, Dahlquist FW, Proc Natl Acad Sci U S A 1998 Jun 23;95(13):7333-8. PMID: 9636149

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