Proton atpase

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proton ATPase

(Science: enzyme) An ion pump that actively transports hydrogen ions across lipid bilayers in exchange for aTP.

major groups are the f-type ATPases, that run in reverse to synthesise aTP in bacterial, mitochondrial and chloroplast membranes (aTP synthase) and the v-type ATPases found in intracellular vesicles with an acidic lumen and on certain epithelial cells (e.g. Kidney intercalated cells). Gastric H/K aTPase is a proton ATPase.

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