氨基酸活化成氨酰tRNA tRNAphe:苯丙氨酰tRNA 氨酰-tRNA合成酶 phe+ tRNA+ATP- tRNApne+ AMP+PPi Amino acid phenylalanine H2N一C一C-OH d2N C-OH tRNA specific for phenylalanine(tRNA) Aminoacyl RNA synthetase AAA Linkage of AAA pecific for phenylalanine to tRNAPhe phenylala△氨基酸活化成氨酰tRNA tRNAphe ：苯丙氨酰tRNA 氨酰-tRNA 合成酶 phe+ tRNA+ATP tRNAphe+AMP+PPi OH3’ A C C A C C