Figure 3.

A phylogenetic tree of voltage-gated sodium channel α-subunits. Rat sodium channel protein sequences were aligned using ClustalW and the tree was constructed using PAUP. The human chromosomes on which the human ortholog of each rat gene is found are shown on the right. Adapted from [13].

Yu and Catterall Genome Biology 2003 4:207   doi:10.1186/gb-2003-4-3-207