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. 2003 Sep 24;100(21):12235–12240. doi: 10.1073/pnas.1635157100

Fig. 2.

Fig. 2.

Phylogenetic tree of 388 functional OR genes. Filled circles at internal nodes represent the clades supported with >90% bootstrap values. Bootstrap values are shown only for phylogenetic clades A–S, and for three branches, a–c. Gene names are omitted for brevity. The family names defined by Glusman et al. (18) are shown in brackets. The OR genes in clade E are not found in the Human Olfactory Receptor Data Exploratorium database. The scale bar indicates the estimated number of amino acid substitutions per site. The number of amino acid sites used is 235.