2021/2/21 Translation machinery 1. mRNAs(N5%of total cellular RNA) 2. trNas(~15%) 3. aminoacyl-tRNA synthetases (氨酰tRNA合成酶) 4. ribosomes(N100 proteins and 3-4 TRNAs-~80%)2021/2/21 8 Translation machinery 1. mRNAs (~5% of total cellular RNA) 2. tRNAs (~15%) 3. aminoacyl-tRNA synthetases (氨酰tRNA合成酶) 4. ribosomes (~100 proteins and 3-4 rRNAs--~80%)