Fig. 1From: From protein-protein interactions to protein co-expression networks: a new perspective to evaluate large-scale proteomic data a Biological networks. Nodes may represent several types of biological elements, while the edges describe the nature of their relationship. If A and B are two nodes connected by an edge, (A,B)∈E, B is a neighbor of A or A and B are adjacent. b Protein network classification proposed by Vidal et al. [25]Back to article page