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. Author manuscript; available in PMC: 2012 May 1.
Published in final edited form as: Nat Chem Biol. 2011 Oct 2;7(11):766–768. doi: 10.1038/nchembio.667

Figure 1.

Figure 1

AHK4 binds cytokinins with its membrane-distal PAS domain. a, Ribbon diagram of the sensor domain homodimer (residues 126-391). The N-terminal stalk helix and the dimerisation interface is shown in orange, the membrane-distal cytokinin binding domain in dark-blue, and the membrane-proximal PAS domain is in light-blue, respectively. Disulphide bridges are depicted in green. One molecule of iP (in yellow) binds per AHK4 monomer. b, Close-up of the cytokinin binding pocket complexed with iP (in bonds representation).