Fig. 2.

A-to-I editing and C-to-U editing of tRNA. Only few examples of C-to-U editing of tRNAs have been described and in all cases, with the exception of archaea, the editing enzyme has not been identified. Edited nucleotides are shown in colored circles with numbers denoting the specific tRNA nucleotide position. The enzymes responsible for a particular editing event is shown in parentheses, unless the enzyme has not been identified which is denoted as “unknown”. The colored boxes also show the tRNAs and organisms where editing has been described.