Figure 2.
Propensities of residues to occur in a particular SSE in the interface relative to the same SSE in the tertiary structure in (a) protein-DNA and (b) protein-RNA complexes. A propensity of 1.0 indicates that the frequency of observing a particular residue in a given SSE in the interface is the same as that of the corresponding frequency for the entire tertiary structure; a value >1 (or <1) indicates higher (or lower) occurrence at the interface.