Drop in IS values between phylogenetic depths of 0.6 and 0.8 for the real data and three simulations of the Biological Big Bang (BBB). Red, real data; blue, BBB simulated at the depth of 0.6; green, BBB simulated at the depth of 0.7; violet, BBB simulated at the depth of 0.8. The horizontal axis shows the number of simulated HGT events and the vertical axis shows the differences between IS values at the phylogenetic depths of 0.8 and 0.6.
Puigbò et al. Journal of Biology 2009 8:59 doi:10.1186/jbiol159