Figure 4
From: Rapid and asymmetric divergence of duplicate genes in the human gene coexpression network
The schematic representation of duplicate gene evolution (A) prior to duplication event, (B) immediately after duplication, (C, D, E) after some time following gene duplication. The ancestral singleton gene is shown with a crossed line, duplicate genes are in black, shared ancestral partners are in grey, unique ancestral partners are in stripes, and unique acquired partners are in white; n s , n1 and n2 are the numbers of partners for a singleton, first duplicate, and second duplicate, respectively; n12 is the number of shared partners for a duplicate gene pair.