Structure & function of inward rectifier K channels
The channel can be viewed from different angles by clicking and dragging your mouse across the image (works best with Safari web browser).
Kir1.1, homology-modeled on the bacterial K+ channel structure1P7B. The channel is composed of four identical protein chains, represented as backbone ribbons. Four potassium ions (red spheres) are located in the selectivity filter of the channel.
Homology modeling and Jmol scripting by Eric Walters, Dept. of Biochemistry and Molecular Biology.