Table 1

Protein domain gains and loss comparison between lophotrochozoans and ecdysozoans

Ancestor domains

Extant domains

Gains

Losses

Present

Mean

Standard deviation

Genomes analyzed

Lophotrochozoans

16

545

4,215

3,605

320

3

Annelids

16

721

4,039

3,602

393

2

Ecdysozoans

24

736

4,032

3,202

190

12

Arthropods

38

864

3,918

3,256

172

9

Nematodes

39

1,477

3,306

3,039

143

3

In this table, gains and losses are relative to the last common ancestor of deuterostomes and protostomes, the Urbilateria. For the calculation of extant domain statistics, data from parasitic species is omitted (the nematode Brugia malayi and the flatworm Schistosoma mansoni).

Zmasek and Godzik Genome Biology 2011 12:R4   doi:10.1186/gb-2011-12-1-r4