Figure 6. H8-L-H9 sequences and the D-helix (and associated) nucleotides of tRNAGlx for: (A ) ε-proteobacterial GluRS(T1/T2), (B ) γ-proteobacterial GluRS(T1/T2), (C ) α-proteobacterial GluRS(D+), (D ) α-proteobacterial GluRS(ND) that appeared in cluster C of Figure 3B and (E ) α-proteobacterial GluRS(ND) that appeared in clusters E and F of Figure 3B.