Correlation between covariation score and physical proximity between each PRD site and its highest-scoring peptide PWM position for the four types of PRDs. Selected top-scoring pairs discussed in the text are circled. The correlation for synthetic PDZ was not statistically significant due to the small number of data points involved.
Yip et al. BMC Biology 2011 9:53 doi:10.1186/1741-7007-9-53