Figure 2From: The plant Polycomb repressive complex 1 (PRC1) existed in the ancestor of seed plants and has a complex duplication history Schematic gene trees of Ring1 (A) and Bmi1 (B). Red squares show gene duplications. A. thaliana genes are denoted in blue letters. Brassicaceae are depicted in detail; inferred gene losses are shown with gray dashed line. Black dashed line: loss of one of the domains.Back to article page