Ionophoretic stimulation of K+-ATPase of oxyntic cell microsomes
作者： Allen L. Ganser , John G. Forte
DOI: 10.1016/0006-291X(73)91478-2
关键词: Biophysics 、 Gramicidin 、 Population 、 Vesicle 、 ATPase 、 Stereochemistry 、 Valinomycin 、 Microsome 、 Ionophore 、 Nigericin 、 Chemistry 、 Cell biology 、 Biochemistry 、 Molecular biology
摘要: Abstract The K + -selective ionophores valinomycin, trinactin, nigericin, and gramicidin stimulated the -ATPase of oxyntic cell microsomes as much 5 fold. Gramicidin altered activation kinetics: while V max greatly increased, a for shifted only slightly. Activation also occurred with lyophilization, repeated freezing thawing nonionic detergents. results are consistent one population membranes being freely permeable to (source -dependent activity in absence ionophore) another impermeable . these latter vesicles would be activated by appropriate ionophore or membrane disruptive procedure.
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