Figure 1From: Phylogenetic placement of metagenomic reads using the minimum evolution principlePrimary data set. 1a) depicts the model tree for generating the sequences for the S500R data set. 1b) shows a histogram of branch lengths (substitutions per site) of the S500R tree. The detail shows the finer division of the first bin of the larger graph. 7.4% of branches, for example, have length less than or equal to 0.001 substitutions per site.Back to article page