Figure 4From: Multiple sequence alignments of partially coding nucleic acid sequencesRelative distribution of gaps in an alignment of genomic Hox4 sequences. The alignment is essentially gap-less in exon 2. ClustalW (above) returns a very poor alignment of exon 1 in which gaps occur with a broad distribution. In contrast, codaln respects the coding region so that almost all gap lengths in this area are divisible by 3.Back to article page