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标题：The Effects of Dietary Amino Acid Levels upon Lysine and Methionine Requirements for Growing Rats
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作者：Atsuyoshi HOSOI ; Kyoichi KISHI ; Goro INOUE 等
期刊名称：Journal of Nutritional Science and Vitaminology
印刷版ISSN：0301-4800
电子版ISSN：1881-7742
出版年度：1988
卷号：34
期号：2
页码：245-259
DOI：10.3177/jnsv.34.245
出版社：Center for Academic Publications Japan
摘要：The amino acid requirement has been investigated by many laboratories since 1931. Authors considered that the requirement was influenced by the protein level of the basal diet and also by the experimental method. In light of those earlier studies, the present study investigated the effect on lysine and methionine requirements by modify-ing total nitrogen level or essential amino acid level. The result of our study confirmed that when the amino acid requirement for maximum growth was expressed as the dietary percentage, amino acid to total amino acid ratio, and amino acid to total nitrogen ratio, the requirement had changed according to not only essential amino acids but also to non-essential amino acids. Furthermore, we investigated the relationship between amino acid intake and body protein gain, and found that 6.2mg lysine and 9.0 mg methionine were required for the maintenance of a rat weighing 80g and 71.6mg of lysine and 48.8mg of methionine were required for one gram of body protein gain. The lysine and methionine intakes required for one gram of protein gain were equivalent to 100% and 124% of amino acid contents of body protein, respectively.
关键词：lysine requirement;methionine requirement;E/TN ratio;dietary N level;maximum growth;body protein gain