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. 2016 Nov 4;10:103. doi: 10.1186/s12918-016-0346-4

Table 2.

Overview of the data sources

Data Proteins Non redundant interactions Reference
DIP 23,680 70,630 [53]
STRING 5,214,234 336,561,678 [54]
IntAct 60,846 314,019 [55]

STRING database contains in total of 673,123,356 interactions including duplicate interactions (downloaded in 2014, June). DIP, STRING and IntAct are publicly available and free to use.