Table 1.

Expanded phylogenetic representation of tRNA gene sets used as training for tRNA covariance model creation. The tRNA genes were grouped by source species’ domains for building domain-specific covariance models. For tRNAscan-SE 2.0, tRNA sequences were further sub-grouped into different isotypes for the generation of domain-specific, isotype-specific models.

	Models in tRNAscan-SE 1.3		Models in tRNAscan-SE 2.0
Domain	Number of genera	Number of genomes	Number of genera	Number of genomes
Eukaryota	88	115	110	155
Bacteria	23	33	647	4016
Archaea	13	18	75	182
Total	124	166	838	4285