Figure 1From: ProCARs: Progressive Reconstruction of Ancestral Gene OrdersExample of a species tree. A species tree on five genomes A, B, C, D, and E. The black-colored ancestral node defines two ingroup sets each composed of a single genome, I1 = {D} and I2 = {E}, and an outgroup set O = {A, B, C}. The conserved adjacencies at the ancestral black-colored node are given.Back to article page