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. 2009 Feb 23;4(2):e4568. doi: 10.1371/journal.pone.0004568

Figure 3. Gene trees with two post-duplication outgroups.

Figure 3

a) The general case for two post-duplication outgroups X1 and X2, diverged e 1 and e 2 before that C/AB split, respectively. b) X1, X2 and C retain the same duplicate copy. c) X1 and C (but not X2) retain the same duplicate copy. d) X2 and C (but not X1) retain the same duplicate copy. e) X1, X2 and B retain the same duplicate copy. Red and blue indicate NST and KNST branches, respectively.