Reactions of chlorogenic acid and quercetin with a soy protein isolate - Influence on the in vivo food protein quality in rats
- Plant phenolic compounds are known to interact with proteins producing changes in the food (e.g., biological value (BV), color, taste). Therefore, the in vivo relevance, especially, of covalent phenolprotein reactions on protein quality was studied in a rat bioassay. The rats were fed protein derivatives at a 10% protein level. Soy proteins were derivatized with chlorogenic acid and quercetin (derivatization levels: 0.056 and 0.28 mmol phenolic compound/gram protein). Analysis of nitrogen in diets, urine, and fecal samples as well as the distribution of amino acids were determined. Depending on the degree of derivatization, the rats fed with soy protein derivatives showed an increased excretion of fecal and urinary nitrogen. As a result, true nitrogen digestibility, BV, and net protein utilization were adversely affected. Protein digestibility corrected amino acid score was decreased for lysine, tryptophan, and sulfur containing amino acids.
Author details: | Sascha RohnORCiDGND, Klaus-Jürgen Petzke, Harshadrai Manilal RawelORCiDGND, Jürgen KrollGND |
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DOI: | https://doi.org/10.1002/mnfr.200600043 |
ISSN: | 1613-4125 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/16835872 |
Title of parent work (English): | Molecular nutrition & food research : bioactivity, chemistry, immunology, microbiology, safety, technology |
Publisher: | Wiley |
Place of publishing: | Weinheim |
Publication type: | Article |
Language: | English |
Year of first publication: | 2006 |
Publication year: | 2006 |
Release date: | 2020/06/10 |
Tag: | amino acid score; plant phenolic compounds; protein derivatization; protein digestibility; soy protein |
Volume: | 50 |
Number of pages: | 9 |
First page: | 696 |
Last Page: | 704 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Ernährungswissenschaft |
DDC classification: | 5 Naturwissenschaften und Mathematik / 50 Naturwissenschaften / 500 Naturwissenschaften und Mathematik |
Peer review: | Referiert |