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Influence of pH on the heat-induced proteolysis of casein molecules


, : Influence of pH on the heat-induced proteolysis of casein molecules. Journal of Dairy Research 68(1): 71-80

Proteolysis of sodium caseinate solution (24.5 g/l) induced by heat treatment at 120 degrees C at different pH values was studied by measuring nitrogen content and relative fluorescence intensity in the 4% trichloroacetic acid filtrate. The low molar mass peptides corresponding to the soluble nitrogen were identified using liquid chromatography/tandem mass spectrometry. Increase in proteolysis, deduced from the increase in soluble nitrogen content, was observed with heating time (10, 20 and 30 min) and pH (6.0, 7.0, 8.0 and 9.0). The fluorescence measurements showed that the release of peptides containing tryptophan was minimal at pH approximately 7.0. In parallel, eighteen low molar mass peptides were characterized, of which four came from kappa-casein, nine from beta-casein and five from alpha(s1)-casein. Peptides were preferentially released under alkaline conditions.

US$19.90

PMID: 11289271

DOI: 10.1017/s0022029900004623


Other references

Eskow, R.N., 1988: The American Academy of Oral Medicine has adopted a position condemning the use of smokeless tobacco products. Head & Neck Surgery 10(3): 204-204

Wilkins, Adam S., 2002: Stephen Jay Gould A critical appreciation. BioEssays 24(9): 863-864, September

Moretti G.; Broustet A.; Amouretti M.; Cambeilh C.; Beylot J., 1971: Biermers disease and gastric reticulo sarcoma concerning 1 observation. Bordeaux Medical 4(2): 441-444

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Chalov, A.A.; Chalova, A.A.; Mazur, A.D., 1994: A method for the pharmacological coding of drugs and a table allowing the deciphering of the designated codes. Likars'ka Sprava: 127-129

Bunge M.B., 1973: Uptake of peroxidase by growth cones of cultured neurons. Anatomical Record 175(2): 280

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Monaco, A.P., 2001: Strategies for induction of clinical tolerance. Transplantation Proceedings 33(1-2): 51-56