Table 2. Number of unique BLAST matches between Elliptio complanata transcriptome contigs and each reference database.

Reference	E. camplanata contigs with matches	Proportion of matched sequences in reference genome*
Crassostrea gigas genome	20706	not applicable
Crassostrea gigas proteins	20433	10602/27873
Lottia gigantea proteins	21356	11152/23877
Crassostrea angulata mRNA	11231	7232/unknown
Drosophila melanogaster proteins	12189	6522/13937
Caenhorhabditis elegans proteins	5637	1453/20541

*The numerator is the number of sequences of each reference set that were best matches of at least one E. complanata contig, and the denominator the number of sequences in the reference set.