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  • Title: A simple isolation method for basal-lateral plasma membranes from rat kidney cortex.
    Author: Scalera V, Huang YK, Hildmann B, Murer H.
    Journal: Membr Biochem; 1981; 4(1):49-61. PubMed ID: 6261079.
    Abstract:
    Basal-lateral membranes were separated in a self-orienting Percoll (modified colloidal silica) gradient from a heavy microsomal membrane fraction by centrifugation at 48,000g for 0.5 h. The (Na+--K+)-ATPase activity as a marker enzyme for the basal-lateral plasma membrane was 20-fold enriched by this procedure. The adenylate-cyclase activity measured in the basal-lateral membrane fraction was stimulated 6-fold by parathyrin and only up to 1.5-fold by arginine-vasopressin, calcitonin, or isoproterenol. The yield of basal-lateral plasma membranes was 5 to 10 percent of the amount initially present in the homogenate. The method is also applicable to the pig kidney.
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