title: [Search for phosphopeptides in the feces of axenic rats fed radioactive ovine casein].
abstract: Radioactive ovine casein was obtained by injecting 100 microCi of 14C-Ser into the jugular vein of an ewe. The milk collected 17 and 24 h after this injection contained 12 p. 100 of the radioactivity injected in protein form. The seryl residues were specificially labelled. This casein was used as the only protein source fed to axenic rats; 0.30 p. 100 of the tracer ingested was found in the feces of those rats. Since phosphoserine represented 25 p. 100 of the total casein seryl residues, the phosphopeptides may not be selectively unabsorbable.
mesh_terms: D000818:Animals; D002364:Caseins / Q000378:metabolism*; D002848:Chromatography, DEAE-Cellulose; D002850:Chromatography, Gel; D005243:Feces / Q000032:analysis*; D005260:Female; D005856:Germ-Free Life; D010748:Phosphopeptides / Q000032:analysis*; D051381:Rats; D012694:Serine / Q000378:metabolism; D012756:Sheep
chemical_list: D002364:Caseins; D010748:Phosphopeptides; D012694:Serine
vernacular_title: Recherche de phosphopeptides dans les fèces de rats axéniques alimentés avec de la caséine ovine radioactive.