tRNA remolding/recruitment
To search for close matches between tRNA genes indicative of gene remolding/recruitment, each tRNA gene sequence was aligned to tRNA genes from other available caenogastropod genomes (including new vermetid tRNA sequences). Similarity scores were based on initial tRNA alignments undertaken in MacVector that were subsequently adjusted by eye according to secondary structure features (stems vs. loops). As in [28], the third base of the anticodon triplet was excluded in the calculation of % similarity between two tRNA genes, but gaps were counted as mismatches.