Table 3.

Protein–protein interaction (PPI) datasets for four species.

Species	Dataset	Positive Samples	Negative Samples	Total
E. coli	Original set	6680	6881	13,561
	Training set	6012	6193	12,205
	Testing set	668	688	1356
Drosophila	Original set	19,133	18,449	37,582
	Training set	17,220	16,593	33,813
	Testing set	1913	1856	3769
C. elegans	Original set	3696	3763	7459
	Training set	17,220	16,593	33,813
	Testing set	1913	1856	3769
Mus Musculus	Original set	22,870	—	22,870