Protein also contains leucine , an amino acid that prevents muscle loss when you 're dieting .

蛋白质中含有亮氨酸，这是一种氨基酸能在你节食的时候阻止肌肉消失。

The two missing links in the chain ( a phenylalanine and a leucine , for aficionados ) are encoded in the gene for ordinary tomcod ahr by six genetic " letters " that are missing from the dna found in pcb-resistant hudson tomcod .

2个在基因链上遗失了的（分别是苯丙氨酸和亮氨酸）基因，其实是普通小鳕鱼的ahr的6个遗传基因编码，也就是自哈德逊小鳕鱼体内pcb抗体遗失的dna。