title: [Amino acid composition of non-absorbed peptide fractions in rat small intestines. III. Feeding of wheat gluten and molasses yeast. Essential amino acid content of feces].
abstract: The authors investigated the nitrogen content of different fractions and in particular the aminoacid composition of the trichloroacetic acid (TCA)-precipitable and TCA-soluble peptides in the distal small intestine of rats which had been fed experimental diets (nitrogen-free or containing casein, wheat gluten or molasses yeast as a protein carrier). Parallel with this, they determined in growing rats the nitrogen and amino-acid digestibility of molasses yeast and wheat gluten according to the technique of faecal analysis, and studied the amino-acid composition of the faecal protein. Independently of the dietary protein fed, the peptide fractions of the content of the intestine showed an amino-acid composition that was largely similar to that found in case of nitrogen-free diet. The amino-acid composition of the faecal protein is, independently of the dietary protein given, relatively constant and corresponds approximately to the intestinal loss protein. There is agreement between the amino-acid composition of the TCA-precipitable peptide fractions and those of the corresponding faecal proteins. These components seem to be of endogenous origin.
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D000601:Amino Acids, Essential / Q000032:analysis*; D000818:Animals; D004044:Dietary Proteins; D005243:Feces / Q000032:analysis*; D007408:Intestinal Absorption; D007421:Intestine, Small / Q000378:metabolism*; D008965:Molasses; D010455:Peptides / Q000378:metabolism*; D051381:Rats; D012441:Saccharomyces cerevisiae; D014908:Triticum
chemical_list: D000596:Amino Acids; D000601:Amino Acids, Essential; D004044:Dietary Proteins; D010455:Peptides
vernacular_title: Untersuchungen über die Aminosäurezusammensetzung von nichtresorbierten Peptidfraktionen des distalen Dünndarminhaltes von Ratten. 3. Mitt. Verfütterung von Weizenkleber und Mellassehefe. Untersuchungen über den Gehalt an essentiellen Aminosäuren im Kot.