Abstract
Using zonal sucrose density gradient centrifugation methods to fractionate the subcellular components in gastric mucosal homogenates have been developed. Methods are described which give high yield or rapidity in fractionation. A procedure is described which enables large-scale preparations of smooth walled vesicular membranes containing HCO 3 −-ATPase activity free from mitochondrial contamination as assessed by electron microscopic morphology and undetectable succinic dehydrogenase or monoamine oxidase activity. A method to purify gastric mitochondria is also described.
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