Patent ID: 7494804

Claim:
An expression vector comprising the following operably linked elements: a) a first transcription promoter; a first DNA segment encoding a first cytokine receptor polypeptide comprising amino acid residues 20–732 of SEQ ID NO:111; and a first transcription terminator, and b) a second transcription promoter; a second DNA segment encoding a second cytokine receptor polypeptide comprising amino acid residues 28–979 of SEQ ID NO:7; and a second transcription terminator; wherein the first cytokine receptor polypeptide and the second cytokine receptor polypeptide form a multimeric or heterodimeric cytokine receptor; and wherein the multimeric or heterodimeric cytokine receptor binds to a ligand comprising amino acid residues 27–164 of SEQ ID NO:2.