Table 1. Numbers of interactions in IID compared with I2D 2.3.

Database	IID				I2D
Species/Prediction	Experimental	Orthologous	Predicted	Total	Experimental	Orthologous	Total
Human	204,474	57,829	664,643	850,636	183,524	55,985	228,847
Mouse	29,273	204,305	-	225,247	19,090	190,049	203,114
Rat	5,665	168,137	-	173,802	4,178	116,649	119,527
Fly	59,200	43,037	-	100,316	53,325	45,849	97,967
Worm	13,678	28,567	-	41,544	11,555	39,606	50,486
Yeast	144,526	6,996	61,720	176,351	191,673	12,810	200,587