Abstract: Provided is a human RE2-L protein, as well as the encoding nucleic acid, methods for screening for agents capable of modulating RE2-L related activity and treating RE2-L-mediated conditions. Further provided are animal models useful for screening agents capable of ameliorating or reducing anxiety related disorders and obsessive-compulsive disorders.

Abstract: Methods for treating or alleviating pain by treating a subject in need thereof with an agonist of OPSDL3 activity or expression. Further provided are screening methods for identifying agents capable of activating OPSDL3, and transgenic non-human animals which homozygous for deletion of the endogenous OPSDL3 gene and/or comprise a human OPSDL3 gene.

Abstract: The present invention relates to the discovery, identification and characterization of a receptor protein, referred to herein as T1R3, which is expressed in taste receptor cells and associated with the perception of bitter and sweet taste. The invention encompasses T1R3 nucleotides, host cell expression systems, T1R3 proteins, fusion protein, transgenic animals that express a T1R3 transgene, and recombinant “knock-out” animals that do not express T1R3. The invention further relates to methods for identifying modulators of the T1R3-mediated taste response and the use of such modulators to either inhibit or promote the perception of bitterness or sweetness. The modulators of T1R3 activity may be used as flavor enhancers in foods, beverages and pharmaceuticals.