Number and percentage of isothermal and suppressor graphs, as well as graphs exhibiting one or more transitions.

Graphs are determined up to isomorphism, so any graph cannot be mapped to each other via a permutation of vertices and edges. For graphs of order 6 and 7, the fixation probability has been symbolically computed to exactly give type and place of each transition. These data are gathered in S1 Table. All exact results are marked in bold. However, for graphs of order 8 and more, we must distinguished between suppressors and ‘apparent suppressors’ as fitness values only vary between 1 and 10. Despite this, additional computations for some higher values of the fitness r (varying from 10 to 2,000 with step size of 1) seem exclude more than two transitions in order 8 and 9 and more than three transitions in order 10.