FIG 1.
The universal genetic code. Codons highlighted in orange are translated in bacteria by tRNAs containing cmo5U, those in green by tRNAs with mnm5U, those in blue by tRNAs with mnm5s2U, and those in yellow by tRNAs with cmnm5Um. Codons highlighted in gray are translated by tRNAs with L34 or I34.