Pearson correlation for entropy values of 960 transfer RNAs from the seed alignment of family RF00005 from the database Rfam 11.0 [40].

Upper-triangular entries are for unnormalized entropy values, while lower-triangular entries are for length-normalized entropy values. Entropy values were computed for the same methods described in Fig 1; in particular, all SCFGs were trained with RF00005, as described in [24].