Table 1.

Number and sources of predicted interactions inferred from each reference organism.

	Reference organisms
	Rat	Mouse	Fly	Worm	Thale cress	Baker's yeast	Total (nr)
Proteins	1,183	2,962	9,910	3,607	551	6,590	24,803
Interactions	1,344	3,895	44,119	7,690	2,134	115,903	175,085
Predicted interologs (nr)	476	1,212	13,131	8,429	1,384	82,425	90,871