This page uses the Jmol java applet. Be sure your browser is java-enabled. Be patient--it may take several seconds for the structure to load! After it loads, you can drag the structure to rotate it or shift-drag to zoom. If you have a 2-button or 3-button mouse, the right-button may give you more display options.
This is the structure of a bacterial inward rectifier potassium channel (Protein Data Bank structure 1P7B), determined by X-ray crystallography. The channel is made up of four identical protein chains (each a different color ribbon in this representation). Note that several potassium ions (magenta spheres) are bound into the selectivity filter.
© by D. Eric Walters