Maximum likelihood phylogeny of Triatoma infestans, Triatoma dimidiata, and Rhodnius prolixus cytochrome P450 reductases (CPRs) deduced amino acid sequences (in bold), selected CPRs from other hemipteran species, and representative species of the orders Diptera, Lepidoptera, Coleoptera, and Hymenoptera. Bootstrap values next to nodes represent the percentage of 1,000 replicate trees that preserved the corresponding clade.