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A-DTJ: structure of nucleotide triple [0R;0P;0Q] existing in the bacterial ribosome. In all three A-DTJs and in the quasi-A-DTJ 2AVY-1142, guanosine 0R (white) interacts with the major groove of base pair [0P;0Q] (black). In motifs 2AVY-97, 2AVY-1057, and 2AVY-1142, base pair [0P;0Q] is GC (A), while in motif 2AVY-68, it is GA (B). The interbase hydrogen bonds are shown by dotted lines.
