Figure 2.
A schematic of the current model of structural evolution. The evolution of the structural characters occurs according to divergent rules (Dokholyan et al. 2002; Deeds et al. 2003, 2004), and the domains discovered as a result of this process are specific to a given lineage. Both LGT events and convergent discovery of domains introduce greater degrees of randomness into model structural proteomes (see Fig. 3). Domain D in the acceptor lineage is represented as a dashed line to indicate that it is concomitantly deleted in some LGT models but not in others.
