title: Characterization of microsomal subfractions from porcine endometrium cells.
abstract: Crude microsomes from porcine endometrium and three subfractions obtained by a modification of Rothschild's technique were characterized by RNA/protein ratio, marker enzyme activities and morphological appearance. The microsomes were devoid of glucose-6-phosphatase activity. They contained approximately 10% of arylesterase-, approximately 30% of both NADPH-cytochrome reductase- and UDPgalactose-N-acetyl-glucosamine beta-D-galactosyltransferase- and approximately 60% of 5'-nucleotidase activities present in the homogenates. Subfraction I (smooth membranes) had twice the galactosyltransferase activity of Subfraction II (smooth and rough membranes + free ribosomes); both subfractions were rich in 5'-nucleotidase and cytochrome reductase activities. Subfraction III (rough membranes) had very low marker activities but exhibited the highest RNA/protein ratio, which was lowest in I.
mesh_terms: D000818:Animals; D002458:Cell Fractionation / Q000379:methods; D002499:Centrifugation, Density Gradient / Q000379:methods; D004717:Endometrium / Q000201:enzymology / Q000648:ultrastructure*; D004798:Enzymes / Q000032:analysis; D005260:Female; D008854:Microscopy, Electron; D008861:Microsomes / Q000201:enzymology / Q000648:ultrastructure*; D011506:Proteins / Q000032:analysis; D012313:RNA / Q000032:analysis; D013552:Swine
chemical_list: D004798:Enzymes; D011506:Proteins; D012313:RNA