Extended Data Fig. 2: Cryo-EM density maps and atomic models of selected key regions in cGMP-unbound and -bound structures.
From: Mechanism of ligand activation of a eukaryotic cyclic nucleotide−gated channel

a, cGMP-unbound. The map was low-pass filtered to 2.6 Å, sharpened with a temperature factor of -117 Å2 and contoured at 5σ. b, cGMP-bound. The map was low-pass filtered to 2.7 Å, sharpened with a temperature factor of -113 Å2 and contoured at 5σ.