Fig. 5.

The Euclidean and Robinson–Foulds (Robinson and Foulds 1981) distances between fractional trees, $T_{10\%}$ through $T_{90\%}$, and the true tree, $T_{100\%}$ for the (a) globin, (b) trypsin-like serine protease, and (c) aldo-keto reductase (NADP) superfamilies. As the length difference between the complete and fractional structures decreases, the topologies of the fractional trees approach those of the true tree, $T_{100\%}$.