英语词汇“L-tryptophan”是什么意思，“L-tryptophan”的读音、用法及例句翻译-烛光网

词汇	L-tryptophan
释义	L-tryp·to·phan AHD[ĕl'trĭpʹtə-făn'] D.J.[ˌelˈtrɪptəˌfæn]K.K.[ˌɛlˈtrɪptəˌfæn]n.（名词） The biologically active form of the amino acid tryptophan, which is capable of being incorporated into proteins, such as the neurotransmitter serotonin. It has not been available as a dietary supplement in the United States since 1989 but is sold commercially outside of the United States.L-色胺酸：能与蛋白质合成的色胺基酸生物活化形式，如神经传递素5-羟色胺。直到1989年美国才将其列入辅助食品，但也只在美国以外地区贩卖
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