Calcium pump — Free Physiology Illustration

Physiology

Calcium pump

A large asymmetric transmembrane calcium pump protein spanning the membrane, shown as a thick enzyme-like complex with several rounded transmembrane helices forming a central ion-binding cavity or calcium-binding pocket. On the cytosolic side, the protein has a compact to globular ATPase headpiece, giving it a distinct pump-like silhouette rather than a simple channel. The overall form is compact and directional, with a slightly open notch or transport cavity suggesting ion movement. Typical coloring is teal or blue, with the membrane-spanning domain and cytosolic headpiece clearly differentiated.

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