Figure 1 - full size

Figure 1.
Fig. 1. Classification of aminoacyl-tRNA synthetases adapted from ref. 5. The 20 synthetases are divided into 2 classes of 10 enzymes each. The exceptional class I LysRS is shown in gray. Highlighted with a yellow box, TyrRS and TrpRS from class Ic are paired with PheRS from class IIc.