Leucyl-tRNA synthetase (LeuRS)can link not only the cognate leucine but also the nearly cognate isoleucine andmethionine to tRNA~(Leu).

• 亮氨酰-tRNA合成酶不仅可以把共轭的亮氨酸而且可以把相近的异亮氨酸和蛋氨酸共价连接到tRNA~(Leu)。