Figure 1.

The maximum likelihood estimated per-gene evolutionary variance ($\frac{\widehat{{\sigma }_i^2}}{2\widehat{{\alpha }_i}}$) and population variance (${\hat{\beta }}_i\frac{\widehat{{\sigma }_i^2}}{2\widehat{{\alpha }_i}}$) are plotted against each other. The linear regression line is shown.