Table 1. Summary statistics for pyrosequencing of ESTs from various tissues of Mytilus galloprovincialis.

Species	Mytilus galloprovincialis
Tissue	D. gland	Foot	Gill	Mantle
Total No. of reads	33,992	31,227	58,271	52,057
Total size (bp)	6,988,845	5,984,748	12,157,845	9,293,253
Average length (bp)	205	191	208	178
Total No. of contigs	2,103	724	4,713	1,046
Total No. of contigs with functional assignment against nr	407	145	320	151
Contigs >500 bp	78	24	96	25
Total reads within contigs	25,428	28,682	44,178	46,180
Singleton reads	8,564 (25%)	2,545 (8%)	14,093 (24.2%)	5,877 (11.3%)

D.gland–digestive gland. Bp–base pairs. Contigs–assembled contiguous fragments. Nr–NCBI non-redundant protein database.