Bohlin et al. BMC Genomics 2010, 11:464 http://www.biomedcentral.com/1471-2164/11/464 Page 5 of 8 Figure 2 Significant effects on GC variation. The bars indicate 95% confidence intervals for the effects of various phyla (top panel) and oxygen requirements (lower panel) based on the regression model described by Equation (3) in the Methods section. Note that the values on the horizontal axis are scaled differently in the two panels. Categories with non-overlapping intervals can be said to differ significantly at a 5% level. Only significant effects are included. Figure 3 Overall relation between GC content and GCVAR. The Figure shows GCVAR on the vertical axis versus %GC on the horizontal axis. The trend line is made using standard loess smoother.