Figure 7From: Sigma-2: Multiple sequence alignment of non-coding DNA via an evolutionary modelAligning two sequence fragments. When two sequence fragments A and B, containing two and three sequences respectively, are aligned, the likelihood of the sequences if all five sequences are related (calculated from treeAB) is compared with the likelihood of those sequences if sequences 1 and 2 are unrelated to sequences 3, 4 and 5, but sequences within each fragment are related (treeA, treeB). The likelihoods, and log-likelihood ratio, are calculated as described in the main text.Back to article page