Figure 4From: Analysis of X-ray Structures of Matrix Metalloproteinases via Chaotic Map ClusteringRepresentation of global electrostatic similarity at the S 1 ' subsites. The intra-class and inter-class levels are indicated by the blue-coloured bars and solid red line, respectively. Specificity of S1' subsite demonstrated by its higher level of intra-class similarity compared with inter-class similarity.Back to article page