Additional data file 19.

Phylogenetic tree for families 55-57. Dog and rat OR proteins belonging to the same family were aligned using ClustalW software [31] and a phylogram for each family was constructed using canine ADRB3 gene as the outgroup. Subfamilies are indicated by circled letters. Rat genes are shown in red and dog genes, in blue.

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Quignon et al. Genome Biology 2005 6:R83   doi:10.1186/gb-2005-6-10-r83