Figure 15-14. The plasma membrane of certain acid-secreting cells contains an almost crystalline array of V-class H+ ATPases.

Figure 15-14The plasma membrane of certain acid-secreting cells contains an almost crystalline array of V-class H+ ATPases

This electron micrograph is of a platinum replica of the cytosolic surface of the apical plasma membrane of a toad bladder epithelial cell. Each stud is a single V-class H+ ATPase (≈600,000 MW) composed of several polypeptide subunits surrounding a central channel. [From D. Brown, S. Gluck, and J. Hartwig, 1987, J. Cell Biol. 105:1637.]

From: Section 15.5, Active Transport by ATP-Powered Pumps

Cover of Molecular Cell Biology
Molecular Cell Biology. 4th edition.
Lodish H, Berk A, Zipursky SL, et al.
New York: W. H. Freeman; 2000.
Copyright © 2000, W. H. Freeman and Company.

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