Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/56612
Type: Artigo de periódico
Title: METHIONINE LIBERATION BY PEPSIN-PANCREATIN HYDROLYSIS OF BEAN PROTEIN-FRACTIONS - ESTIMATION OF METHIONINE BIOAVAILABILITY
Author: COELHO, RG
SGARBIERI, VC
Abstract: Albumin (ALE), globulin (GLO), globulin G1 (G1), glutelin (GLU), and a protease inhibitor-lectin rich fraction (PIL) were extracted from LAC-Carioca 80 SH (Phaseolus vulgaris) based on differential solubility. The purpose of the study was to search for different susceptibilities to proteolysis and methionine liberation among protein fractions, The fractions were submitted to pepsin digestion for 3 h, then to pancreatin digestion for another 3 h, under optimum pH and 37C. Degree of hydrolysis (DH) was followed by the TNBS reaction and methionine liberation (Met%) by the chloramine-T method. DH for undenatured proteins was higher for GLO, G1 and GLU (62-71%) and lower for ALE and PIL (51-53%). After denaturation, DH was higher for G1, GLU and GLO (81-86%) and lower for PIL and ALB (66-78%). For undenatured proteins Met% was higher for GLO, G1 and GLU (42-48%), and lower for ALE and Pn (22-29%). For denatured proteins Met% was higher for G1, ALE and GLO (66-73%) and lower for PIL and GLU (50-53%). Overall, hydrolysis and methionine liberation followed the same general pattern for both pepsin and pancreatin digestion, individually.
Editor: Food Nutrition Press Inc
Rights: fechado
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

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