Figure 2

Assessment of the ancestral cores. For each gene battery we show the probability of the genes to be part of the ancestral core for lineage b given that the genes are part (blue) or not (green) of the ancestral core of lineage a. Significant differences between P(core b | core a) and P(core b | not in core a) are indicated by asterisks (p-values < 0.001). Three phylogenetic distances were considered: (a) mammalian; (b) vertebrates; (c) chordates.