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The protein and the amino acid composition of some rice and maize varieties grown in North Vietnam
Author(s) -
Khoi Bui Huy,
Dien Le Doan,
Lásztity Radomir,
Salgó Andras
Publication year - 1987
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.2740390206
Subject(s) - glutelin , amino acid , cultivar , tryptophan , lysine , limiting , composition (language) , food science , methionine , proline , threonine , essential amino acid , prolamin , chemistry , biology , storage protein , agronomy , biochemistry , serine , enzyme , gene , mechanical engineering , linguistics , engineering , philosophy
The protein and amino acid composition of several rice and maize varieties grown in North Vietnam, and their digestibility, was determined. The protein content (N×5.95) of rice cultivars ranged from 7.0 to 10.8% of which 70–80% was in the glutelin fraction. The true digestibility was relatively good (87.6–91.8%). In general, lysine and threonine were found to be the first and second nutritionally limiting amino acids, except for two varieties, which had a low content of sulphur‐containing amino acids. The protein content of maize cultivars ranged from 8.4 to 12.9%. Zein and glutelin were the main components occurring in near‐equal quantities (except in the opaque‐2 mutant). The overall amino acid distribution was similar to that of maize grown in other countries. Lysine levels were relatively low, and it was the first nutritionally limiting amino acid, except in the opaque‐2 cultivar, tryptophan being the second one. The digestibility ranged from 87.5 to 91.1%.