P2Y4 antibodies
This invention provides a receptor having a preference for pyrimidine nucleotides preferably uridine triphosphate over purine nucleotides. A receptor having a preference for pyrimidine nucleotides over purine nucleotides means a receptor for which pyrimidine nucleotides and purine nucleotides are not equally active and equipotent. This means that the receptor according to the invention in presence of these agonists presents a functional response (preferably the accumulation of Inositol triphosphate (IP3), diacylglycerol (DAG), or calcium ions) to lower concentration of pyrimidine nucleotides, preferably uridine triphosphate, than to purine nucleotides or a more important functional response to similar concentration of pyrimidine nucleotide than to purine nucleotide.
1. An isolated antibody which specifically binds to a protein receptor, wherein said receptor comprises the amino acid sequence shown in SEQ ID NO:2.
2. The antibody of claim 1 , wherein said antibody is a monoclonal antibody.
3. The monoclonal antibody of claim 2 , wherein said monoclonal antibody is directed to an epitope of said receptor, wherein said epitope is present on the surface of a cell expressing said receptor.
4. A composition comprising the antibody of claim 1 , and a carrier.
5. The composition of claim 4 , wherein said antibody is a monoclonal antibody.