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Automated analysis of available lysine and tyrosine in foodstuffs
Author(s) -
Bailey Christopher J.
Publication year - 1974
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.2740250817
Subject(s) - lysine , tyrosine , food science , chemistry , chromatography , biochemistry , biology , amino acid
An automated chromatographic procedure for FDNB a ‐available lysine determination is presented. “Available tyrosine” values can be obtained from the results and it is suggested that measurement of 100% tyrosine availability is a useful control for complete reaction of feedstuffs with FDNB. Application of the method to a range of feedstuffs confirmed the high availability of lysine in commercial feedstuffs. Using the tyrosine availability figures as a control, it is suggested that low values of lysine availability for fishmeal and meat and bone meal are an artifact but that grassmeal contains incompletely available lysine.