Fig. 2.

Summarized genome size and CCA frequency data in Bacterial clades broken out by tRNA functional class. Except for columns labelled “All,” “SeC,” and “Pyl,” all columns of frequency data are sorted in decreasing order from left to right by the frequency at which tRNA gene classes template CCA over all prokaryotic genomes that we sampled. Clades are defined as in NCBI Taxonomy. Column labels correspond to IUPAC three-letter amino acid charging identity except for “Ini” (initiators) and “xIle” (AUA-codon-reading isoleucine isoacceptors). “All” summarizes frequency data over all tRNA classes