Table 1.

Summary of the PIN data used in the study. Datasets of varying size and sampling fraction were chosen so as to allow us to evaluate the performance of the method on a selection of different kinds of protein interaction data, representative of those currently available.

species	proteins	interactions	genome size	sampling fraction
S. cerevisae	5035	22118	6532	0.77
D. melanogaster	7506	22871	14076	0.53
H. pylori	715	1423	1589	0.45
E. coli	1888	7008	5416	0.35