Protein and Amino Acid Requirements of Mammals by Anthony A. Albanese

By Anthony A. Albanese

Protein and Amino Acid specifications of Mammals makes a speciality of the choice of the protein and amino acid standards of varied mammals, together with guy specifically. the choice first bargains info on a few species and age alterations in amino acid necessities and the tools of measuring the nutritive worth of protein hydrolysates and amino acid combos. Discussions concentrate on assay equipment in accordance with protein regeneration; specificity of amino acid necessities; amino acid requisites for nitrogen equilibrium within the grownup; and composition of tissue proteins and amino acid specifications for progress. The textual content then examines the laboratory evaluate of amino acid combinations and protein hydrolysates and nutritional proteins and synthesis of tissue proteins. issues comprise function of nutritional proteins within the hypertrophy of gonads, impression of nutritional proteins on repletion of liver proteins, and influence of nutritional proteins at the synthesis of plasma proteins. The ebook examines the protein and amino acid necessities of guy, together with qualitative amino acid necessities of assorted species, progress and protein and amino acid wishes, and metabolic interactions of crucial and nonessential amino acids. the choice is a in charge reference for researchers drawn to the choice of the protein and amino acid standards of mammals, together with guy.

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And Gamble, J . L. (1914). J. Biol. Chem. 19, 239. , and Mitchell, H. H. (1949). J. Nutrition, 37, 303. Treichler, E. (1939). Effect of Age and Other Factors on the Eelationship Between Basal Metabolism and Endogenous Nitrogen Metabolism. Thesis for the Doctorate, University of Illinois. Burroughs, E. , Burroughs, H. , and Mitchell, H. H. (1940). J. Nutrition 19, 271. , and Eittenberg, D. (1941). J. Biol. Chem. 138, 155. , Aub, J. C , and Albright, F . (1929). J. Exptl. Med. 49, 145. , Lee, D.

Depletion—Length of Depletion Period and Type of Diet. The method of assay of liquid protein hydrolysates (44, 45) differs in certain particulars from the method as originally developed and practiced by Cannon and his collaborators (33-38, 49). One of these differences is the time and conditions of depletion. The latter work was first carried out (33, 49) with a protein-low diet (3E) based on natural materials, including carrots, brewer's yeast and liver concentrate. In more recent studies (35, 36) by the University of Chicago group, adult rats were depleted for approximately 3 months on the protein-low diet (3E) and then transferred to protein-free diet (4E) during the repletion periods.

54 DOUGLAS V. FROST The fact that, in each case, at least one of the essential amino acids is supplied at a level below the maximum is sufficient for the failure of any of these proteins to give a maximum response at this very low feeding level. 24 g. N level, such proteins as egg albumin and whole egg will supply more than 100 per cent of the requirement, but wheat gluten and peanut flour still fall far short. There is evidence that the methionine of casein is not well utilized (45) so that the apparent superiority of casein over beef muscle appears as an artefact.

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