the activation of the catalytic center of aminoacyl-trna synthetases upon binding of the trna , previously reported in the case of yeast phenylalanyl-trna and valyl-trna synthetases [ renaud et al. , ( 1981 ) proc . natl acad . sci . usa , 78 , 1606-1608 ] has been investigated in other systems .
C0002529
aminoacyl-trna synthetases
C0042301
valyl-trna synthetases