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. 2010 Nov 30;5(11):e14172. doi: 10.1371/journal.pone.0014172

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Ferrada, Wagner.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(a) Distribution of the number of structures associated with a particular function. The total number of different structures (457) in our dataset composed of 39.529 sequences are classified according to the enzyme function that they perform and counted (min = 1 ; max = 14 ; mean = 1.2). The inset shows the same distribution, but with a log₁₀-transformed vertical axis. (b) Distribution of structural promiscuity. Structural promiscuity (R_F) is an entropy-like measure (see main text) calculated from the distribution of enzyme functions over different protein domains. The data shown is based on the finest-grained, fourth level of the EC hierarchy. (min = 0.0; max = 0.35; mean = 0.01).