Order and identity of genomes deletions for the 30 permutations depicted in Figure 1. Genomes are in decreasing order from largest to smallest outlier. Phylogenetic profiles for a given genome set were grouped into biological processes defined by gene ontology; a pairwise distance matrix was then generated to identify the outlier genome (no ties were discovered). To evaluate the affect of size and composition on the power of a phylogenetic profile to predict function, outlier genomes were removed one-by-one until the size of the genome set equaled 2, i.e. composed of just Hsa and Mus.