Grundsätzliches zur Funktion von Biomembranen

Knauf, H.

doi:10.1007/978-3-642-85450-7_172

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1976

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“…Kasbekar und Durbin, 1965 Sachs, Mitch und Hirschowitz, 1965 Simon, Kinne undWizemann et al, 1974 Simon, Kinne und Knauf, t972Wais undKnauf, 1975 Kinne-Saffran undSchwartz et al, 1974Schwartz, 1974 …”

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Die Bedeutung der HCO 3 ? -ATPase in der H+/HCO 3 ? -Sekretion

Simon

Knauf

1976

Klin Wochenschr

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Active buffer transport, e.g. H+ -secretion by stomach and kidney and HCO3--secretion by pancreas and salivary glands, is linked with the presence of a HCO3-stimulated ATP-Phosphohydrolase. In contrast to (Na+ -k+)-ATPase which is considered to be equivalent to the Na+ pump, the HCO3--ATPase requires only one ion for activation and is insensitive to ouabain. The HCO3--ATPase is found in the plasma membrane of the epithelia, but in contrast to the (Na+ -k+)-ATPase it is located in the luminal cell border. The activity of the HCO3--ATPase changes in parallel along with the rate of active buffer transport, a finding which underlines its importance as a transport enzyme. Several disorders of buffer transport are described which are possibly associated with a defect of the HCO3--ATPase system.

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