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. 2011 Dec 1;7(12):e1002395. doi: 10.1371/journal.pgen.1002395

Figure 2. The frequency of amino acid substitutions attributable to positive selection in the D. melanogaster lineage (left bars) and the D. simulans lineage (right bars).

Figure 2

A+: beneficial substitutions (γ>0) attributable to selection. D+: beneficial substitutions (γ>0) attributable to drift. D0: neutral substitutions (γ = 0) attributable to drift. D–: deleterious substitutions (γ<0) attributable to drift.