FIG. 2.

Secondary structure of tRNAs deduced from the sequence of cDNAs. Cloverleaf structures of analogous mitochondrial tRNAs from Physarum and Didymium are compared. Analogous tRNA pairs are labeled with their cognate amino acid based on the tRNA anticodon. Nucleotides inserted in the tRNAs relative to their mtDNA sequence are indicated by arrows. Locations in which the exact site of the insertion is ambiguous due to cytidine insertions next to encoded cytidines or uridine insertions next to encoded uridines are indicated by dotted lines. Nucleotides in Watson-Crick base pairs are connected by a dash, nucleotides in GU wobble base pairs are connected by a closed dot, and nucleotides in other base pairs are connected with an open dot. Some of the sequences for the cloverleaf structures for tRNA₁^Met and tRNA^Pro from Didymium are not shown since they were derived from the primer and not from the mtDNA or tRNA template.