Figure 1
From: Estimating the extent of horizontal gene transfer in metagenomic sequences
Example of the assignment of a contig. The phylogenetic tree including the homologues found for each of the putative ORFs is shown, and coloured according the taxa. According to the phylogenetic method, the first two ORFs could be assigned to the Epsilon-proteobacteria class, while the third remains unassigned. Since the majority of the ORFs in the contig belong to Epsilon-proteobacteria, this would be the proposed source for the contig itself.