Thousands of Rab GTPases for the Cell Biologist
Figure 7
Summary of evolutionary age and duplication origin of human subfamilies.
Each level represents a nested evolutionary stage from the LECA to humans (derived from [115], [119]) with one circle per human subfamily. Those subfamilies for which we could establish a clear origin, that is which subfamily it was derived from by duplication, are right from the dotted line with the subfamily it was derived from attached at the bottom right.