Multi-interface domain distribution at different SCOP levels.

<p>Length of lines represents the normalized number of multi-interface proteins at each classification level, and multiple lines under the same level of one cluster represent different sub-clusters. The clusters are organized as a rooted tree structure from a higher level to a lower level, and the clusters at the same level are plotted in the clockwise descendant order. Here <i>a</i> represents and <i>b</i> represents .