Premium
Chick bioassay of available methionine and sulphur amino acids (SAA). Assay of African oil bean meal ( Pentaclethra macrophylla benth), conophor seed meal ( Tetracarpidium conophorum , hutch) and groundnut meals ( Arachis hypogeae linn)
Author(s) -
Njike Michael C.,
Mba Akpan U.,
Oyenuga Victor A.
Publication year - 1975
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740260612
Subject(s) - methionine , bioassay , meal , amino acid , biology , plant protein , food science , arachis , biochemistry , botany , genetics
Available methionine and sulphur amino acids (SAA) were determined in a range of plant protein concentrates using a chick assay procedure described in our first paper 1 in this series. There were more instances of invalid assays in plant proteins than in proteins of animal origin. 2 This tended to indicate that the procedure is not suitable for estimating available methionine and SAA in plant proteins of low SAA content. Potencies of groundnut meals and conophor seed meal in terms of methionine were high but their available SAA were low. It appears from our results that the inferiority of plant proteins when compared with animal protein concentrates cannot be explained in terms of unavailable methionine but on the inadequacy of the total content of methionine in the plant materials.