Redundancy analysis algorithm scheme. In step A a network is captured from a given database. In step B, the network is decomposed into its interaction pairs. In step C, Protopia looks for the SwissProt code of both proteins of every pair captured. In step D, the specific database code (for each of the other databases) for the SwissProt code is located. In step E, the interactions between the specific codes of the pairs are located in all the other databases. Finally, step F checks if the interaction has been found, and in this case a unit is added to the redundancy factor numerator.