Figure 5
(A) Phylogenetic relationship of butyrophilin-like genes located in the proximal part of the class III region (position 558–792 kb). Rat genes Btnl4 to Btnl9 and mouse genes Btnl4 to Btnl7 duplicated and diverged after the split of the rat and mouse lineages (mouse Btnl7 corresponds to accession number AF030001). (B) Phylogenetic analysis of rat (Or) and mouse olfactory receptor (MOR designation) genes in the distal part of the MHC. Considerable orthology is detected among rat and mouse olfactory receptors. Trees were generated using UPGMA (A) and minimum evolution (B). Asterisks and open circles indicate bootstrap levels (500 replicates) of ≥95% and ≥70%, respectively.
