Fig. 5
From: Identification of a homogenous structural basis for oligomerization by retroviral Rev-like proteins
Evolutionary history of coiled-coil structure in retroviruses encoding Rev-like proteins using a Pol-based tree. Area of filled circles indicates probability of coiled-coils being present at that node; red arrows correspond to major transitions from high to low probability of coiled-coils signals in the phylogeny. Black arrow indicates the overall probability of an ancestral Rev coiled-coil