Synteny analysis of Xenopus laevis MC3Rs. Synteny mapping of MC3Rs with Callorhinchus milii (elephant shark), Danio rerio (zebrafish), Rhinatrema bivittatum (two-lined caecilian), Microcaecilia unicolor, Xenopus tropicalis, Xenopus laevis, Podarcis muralis (common wall lizard), Gallus gallus (chicken), Mus musculus (house mouse), and Homo sapiens (human). Genes in blue represent positional genomic conservatism during evolution among multiple species.