Fig. 2
From: Aligning the unalignable: bacteriophage whole genome alignments
The column graph and the alignment graph. a A set of two exact matches on three genomes; the total length of matches is 8. b The matches define columns for which all positions contain the same nucleotide. The column graph is obtained by adding edges corresponding to consecutive positions in the genomes. c Consecutive columns with the same support are merged to form the alignment graph, whose vertices are exact alignments