This invention provides isolated nucleic acids encoding mammalian SNORF62 and SNORF72 receptors, purified mammalian SNORF62 and SNORF72 receptors, vectors comprising nucleic acid encoding mammalian SNORF62 and SNORF72 receptors, cells comprising such vectors, antibodies directed to mammalian SNORF62 and SNORF72 receptors, nucleic acid probes useful for detecting nucleic acid encoding mammalian SNORF62 and SNORF72 receptors, antisense oligonucleotides complementary to unique sequences of nucleic acid encoding mammalian SNORF62 and SNORF72 receptors, transgenic, nonhuman animals which express DNA encoding normal or mutant mammalian SNORF62 and SNORF72 receptors, methods of isolating mammalian SNORF62 and SNORF72 receptors, methods of treating an abnormality that is linked to the activity of the mammalian SNORF62 and SNORF72 receptors, as well as methods of determining binding of compounds to mammalian SNORF62 and SNORF72 receptors, methods of identifying agonists and antagonists of SNORF62 and SNORF72 receptors, and agonists and antagonists so identified. This invention also provides methods of treating an abnormality that is linked to the activity of a mammalian NMU receptor, as well as methods of determining binding of compounds to mammalian NMU receptors, methods of identifying agonists and antagonists of NMU receptors, and agonists and antagonists so identified.