The three universally accepted mechanisms of chloride transport across plasma membranes are: (i) sodium-coupled symport; (ii) anion-coupled antiport; and (iii) coupling to primary ion transport through electrical and/or chemical mechanisms. No direct evidence has been provided for primary chloride transport despite numerous reports of cellular, anion-stimulated ATPases and of chloride transport processes. Anion-stimulated ATPases are of mitochondrial origin and are a ubiquitous property of practically all animal cells. It also appears that there are other subcellular sites of anion-stimulated ATPase activity, especially the plasma membranes. Recent studies have provided indirect evidence (through parallel studies on the same tissue of anion-stimulated ATPase activity and chloride fluxes) which suggests a possible involvement of ATPase in net movement of chloride up its electrochemical gradient across plasma membranes. Further studies are required to substantiate a direct transport function to Cl--stimulated ATPases located in the plasma membrane.
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JOURNAL ARTICLE| 01 September 1983
Cl--stimulated adenosine triphosphatase: existence, location and function
G. A. Gerencser
S. H. Lee
Online Issn: 1477-9145
Print Issn: 0022-0949
© 1983 by Company of Biologists
J Exp Biol (1983) 106 (1): 143–161.
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G. A. Gerencser, S. H. Lee; Cl--stimulated adenosine triphosphatase: existence, location and function. J Exp Biol 1 September 1983; 106 (1): 143–161. doi: https://doi.org/10.1242/jeb.106.1.143
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