ct binding to intestinal receptors was determined by injected radiolabeled ct into the loops of rat small intestine and subsequently separating purified microvillus membranes from mucosal scrapings of those loops . substantial radioactivity ( 10 ( 5 ) cpm/mg of microvillus protein ) was present in microvillus fractions of small intestine exposed to 125i-labeled ct compared to radioactivity ( 10 ( 2 ) cpm/mg ) in fractions from intestine exposed to radiolabeled bovine serum albumin ( bsa ) used as a control .
C0021852
small intestine
C0021853
intestine