Fig. 7. A phylogenetic tree of myosin light chain 2 (MLC2) sequences constructed using the neighbour-joining method. The lengths of branches are proportional to the phylogenetic distances estimated using Kimura’s empirical method for protein distances (Kimura, 1983). Danio rerio cardiac MLC2 is included as an outgroup. Numbers indicate percentages of 100 bootstrap replicates in which the same internal branch was recovered.