Figure 8  Comparison of the probability distributions of Phylogenic Similarity scores of the training set (dashed) and the random set (solid). x-axis refers to Phylogenic Similarity Score while y-axis refers to its probability distribution. The training set is based on all known gene/TF interactions from [14]. The random set consists of all possible gene/TF interactions. It is seen that higher score implies higher likelihood of a gene/TF interaction, particularly when the similarity score is greater than 500.