Table 2. Comparison of AUC test of GGA and MDS methods by deletion noise.

	Del Ratio	0.2	0.4	0.6	0.8
CS	GGA-method	0.9307	0.9114	0.8661	0.7131
	MDS-method	0.7059	0.6975	0.6161	0.5226
Y2	GGA-method	0.7922	0.7676	0.7277	0.6608
	MDS-method	0.5413	0.5807	0.5973	0.5666
VM	GGA-method	0.8912	0.8673	0.7893	0.7143
	MDS-method	0.6602	0.6023	0.5091	0.3635

AUC values are computed for both methods under certain level of deletions of true positive PPIs in the original network. ‘Del Ratio’ indicates the ratio between removed true PPIs and the number of PPIs in the original network and the corresponding AUC values are filled in the table.