FIGURE 3. Opportunity for canalization.
From the following article:
A mutation accumulation assay reveals a broad capacity for rapid evolution of gene expression
Scott A. Rifkin, David Houle, Junhyong Kim and Kevin P. White
Nature 438, 220-223 (10 November 2005)
doi:10.1038/nature04114
Shown are log–log plots of Vm versus Vr. Top, BPF; rs = 0.75. Bottom, PF; rs = 0.74.