Additional file 4: Table S2. Datasets of the nematoda ESTs used in this study. The datasets from NCBI and Nembase 4 databases consist of 1,331,401 ESTs sequences from 45 genuses and 75 species clustered into three life styles. * Life style classification: FLN, free living nematode; PPN, plant parasitic nematode; APN, animal parasitic nematode.