Table 1.

Reconstruction of protein families from the proteomes of 6 free-living nematodes, 4 parasitic nematodes and 3 outgroup species.

	Species	Total proteins	Proteins in OPFsa	Clustered singletons	OPFs with >1 member	Proteins in OPFs with >1 member
Outgroups	Homo sapiens	24,013	17,807	6206	5463	11,669
	Drosophila melanogaster	14,141	9466	4675	4274	8949
	Saccharomyces cerevisiae	6698	3343	3355	1725	5080
Nematodes	Caenorhabditis elegans	20,173	18,602	1571	9234	10,805
	C. brenneri	30,702	26,949	3753	9650	13,403
	C. japonica	25,870	20,695	5175	8672	13,847
	C. remanei	31,518	28,675	2843	10,171	13,014
	C. briggsae	21,974	19,194	2780	9626	12,406
	Pristionchus pacificus	29,201	18,649	10552	6401	16,953
	Meloidogyne hapla	14,421	11,824	2597	6141	8738
	M. incognita	19,212	17,109	2103	5833	7936
	Brugia malayi	11,407	8376	3031	4686	7717
	Trichinella spiralis	16,124	10,804	5320	4064	9384

^aOPF, orthologous protein families.