Kinetic studies ofin vivodigestion of bovine unheated skim-milk proteins in the rat stomach
- 1 February 1983
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Dairy Research
- Vol. 50 (1), 27-36
- https://doi.org/10.1017/s0022029900032490
Abstract
The in vivo action of gastric proteinases on bovine milk proteins was studied in rats fed with skim-milk, by analysing gastric contents after 30, 60 and 240 min of digestion. Gastric proteolysis was already marked after 30 min of digestion and liberated a large number of peptides with different molecular weights. αs1-Casein and β-casein were still the main components of the stomach contents together with α-lactalbumin and β-lactoglobulin, which were little degraded, even after 240 min of digestion. A statistical analysis (multivariate method), made on several parameters (such as pH, N, and NPN) showed changes in the stomach contents during the digestion. The amino acid composition of the protein fraction was close to that of the diet, whilst that of the non-protein fraction was very different, being between the amino acid composition of the endogenous proteins and that of the diet.Keywords
This publication has 10 references indexed in Scilit:
- In vivo studies on the digestion of bovine caseins in the rat stomachJournal of Dairy Research, 1981
- Electrofocusing and two-dimensional electrophoresis of bovine caseinsJournal of Dairy Research, 1981
- Proteolytic specificity of chymosin on bovine αs1-caseinJournal of Dairy Research, 1979
- Etude du rôle des micro-organismes et des enzymes au cours de la maturation des fromages. II. - Influence de la présure commercialeLe Lait, 1975
- A rennin-sensitive bond in αs1Β-caseinJournal of Dairy Research, 1974
- ÉTUDE DE LA PROTÉOLYSE DES CASÉINES αS1ET β BOVINES PAR LA PRÉSURE SPÉCIFICITÉ D'ACTION. PEPTIDES AMERS LIBÉRÉSAnnales de Biologie Animale Biochimie Biophysique, 1974
- Correspondence Analysis: A Neglected Multivariate MethodJournal of the Royal Statistical Society Series C: Applied Statistics, 1974
- The action of rennets on the caseins: I. Rennin action on β-casein-B in solutionJournal of Dairy Research, 1971
- ÉTUDE DE LA SÉCRÉTION D'ENZYME COAGULANT DANS LA CAILLETTE DE L'AGNEAUAnnales de Biologie Animale Biochimie Biophysique, 1963
- 303. The production of rennet from living calvesJournal of Dairy Research, 1943