Figure 4 Phylogenetic tree constructed of intact ORs. Genes labeled in blue were determined to have significant expression in R-006. The root of the tree established based on class-1 ORs. Nodes displaying bootstrap values of 100, 90-99, 70-80 are denoted by blue squares, yellow circles, and open circles outlined in purple, respectively, while nodes with bootstrap values below 70 are not marked.