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Effect of protein treatment on the enzymatic hydrolysis of lysinoalanine and other amino acids

Savoie, L.

Advances in Experimental Medicine and Biology 177: 413-422

1984

ISSN/ISBN: 0065-2598
PMID: 6437165
Document Number: 234986
Lysinoalanine (LAL) release from alkali-treated proteins by proteolytic enzymes could be measured on a large scale using a digestion method in vitro based on a two-step hydrolysis with pepsin and pancreatin. The hydrolysis was in a dialysis bag, and the digestion products were collected and analysed. Applying this procedure to alkali-treated soyabean and rapeseed protein showed that the release of LAL was not related to its concentration in the protein. LAL release depended on the nature of the protein, the length of the treatment and the presence of untreated protein. The enzymic procedure was also used to measure the release of other amino acids in treated and untreated proteins. This method could directly measure beneficial and adverse effects of processing on amino acid digestibility.

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