Influence of casein and soy flour proteins on aminoacid content in the liver of experimental animals

Title:

Influence of casein and soy flour proteins on aminoacid content in the liver of experimental animals

Creator:

Dudášová, S. and Grančičová, E.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:6ec38b57-8c5b-4547-ad9d-a9a343a8716a
uuid:6ec38b57-8c5b-4547-ad9d-a9a343a8716a

Subject:

liver, dietary proteins, and amino acid metabolism

Type:

article, model:article, and TEXT

Description:

We have observed a significantly increased content of fats and decreased content of proteins in the liver of experimental rats fed a diet supplemented with 25 % casein proteins in comparison with the application of de-fatted soy flour. Casein proteins have a higher content of methionine in relation to cystine than baked soy flour. But the soy diet in contrast to the casein diet has a high content of free aminoacids which are not present in casein at all: aspartic acid, asparagine, a-aminoadipic acid, methionine, norleucine, lysine, phenylalanine, /3-alanine, ethanolamine, histidine, proline, y-aminobutyric acid, taurine. Differences in free valine, alanine, arginine, glycine, ornithine and cysteic acid are also significant. The content of free aminoacids in the liver of experimental animals fed a soy diet is high in the content of cystine, cystathionine, ornithine, /3-aminoisobutyric acid, /3-alanine, y-aminobutyric acid, leucine. We have also found accumulation of methionine, glycine, a-aminobutyric acid, taurine and cytrulline in free aminoacids from the liver of animals fed a casein diet. Citrulline and glycine in free aminoacids from the liver of animals fed a soy protein supplement were not recorded. Our investigations have shown that the application of a soy diet enriched with cystine acts protectively on methionine and that methionine is preferentially utilized for protein synthesis. The catabolic pathway of methionine prevails in animals on a casein diet.

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 1992 Volume:41 | Number:6

Harvested from:

CDK

Metadata only:

false