calcium pump(redirected from calcium-transporting ATPase)
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calcium pump[¦cal·se·əm ‚pəmp]
(cell and molecular biology)
An enzyme that uses the energy generated by the hydrolysis of adenosine triphosphate (ATP) to move calcium ions out of the cytoplasm or, in the case of muscle cells, from the cytoplasm to the sarcoplasmic reticulum. Also known as Ca2+ATPase.