Figure 2From: ProCKSI: a decision support system for Protein (Structure) Comparison, Knowledge, Similarity and InformationBuilding the Protein Universe. 3D proteins structures (left, [68]) can be represented as 2D contact maps that are used to compare pairs of proteins (centre) according to their USM and MaxCMO similarities. The resulting similarity matrices can be clustered in order to produce a hierarchical tree (right, [51]). Spoof protein from Bacillus Subtilis (1NAT) from the Skolnick dataset [23].Back to article page