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. 2012 Mar 6;7(3):e33132. doi: 10.1371/journal.pone.0033132

Figure 2. Frequency distribution of the epistatic effect.

Figure 2

Epistasis for the rate of growth (εr) and the flux of glucose (εg) are shown in red and blue, respectively. Normalization was done by setting the mean growth rate (r) or flux (g) of the strains with no deletions to zero.