Most of the enzymes that perform this type of transport are transmembrane ATPases.
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Many cells also possess a calcium ATPase, which can operate at lower intracellular concentrations of calcium and sets the normal or resting concentration of this important second messenger.
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#F-ATPase: mitochondrial ATP synthase, chloroplast ATP synthase
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In August 1960, in Prague, Robert K. Crane presented for the first time his discovery of the sodium-glucose cotransport as the mechanism for intestinal glucose absorption.
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Thus, all along the gland, there is only a small gradient to climb, in order to push the salt from the blood to the salty fluid with active transport powered by ATP.
They contain an extensive secretory network (called canaliculi) from which the HCl is secreted by active transport into the stomach.