The present invention provides Thymic Stromal Lymphopoietin Receptor (TSLPR)polypeptides and nucleic acid molecules encoding the same. The invention alsoprovides selective binding agents, vectors, host cells, and methods forproducing TSLPR polypeptides. The invention further provides pharmaceuticalcompositions and methods for the diagnosis, treatment, amelioration, and/orprevention of diseases, disorders, and conditions associated with TSLPRpolypeptides.