Potassium channel — Free Physiology Illustration

Physiology

Potassium channel

A stylized potassium-selective transmembrane ion channel shown as a compact, symmetric tetrameric protein complex spanning a lipid bilayer. Four identical subunits are arranged with fourfold symmetry around a central pore, giving the channel a barrel-like to slightly flared cylindrical profile. The pore includes a narrow selectivity filter near one end, a wider inner cavity through the midsection, and an open gate region near the intracellular end. The overall shape may appear subtly squat or slightly wider at the membrane surfaces or middle. Rendered in a clean textbook or scientific schematic style, with coloration varying among purple, blue, blue-gray, teal, or green tones.

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