Depth scaling of the evolvability model. The mean depth scaling of the trees generated with the evolvability model for p = 1 and for p = 0 reproduces the mean depth scaling of the fully balanced (continuous line) and imbalanced binary trees (discontinuous line), respectively. The trees for p = 0.24 (empty diamonds) adjust the average behavior of protein (empty circles) very well. The stars correspond to trees for p = 0.5.
Herrada et al. BMC Evolutionary Biology 2011 11:155 doi:10.1186/1471-2148-11-155