Polypeptides are expressed by the pituitary-tumor-transforming-gene, formerly known as pituitary-tumor-specific-gene, and nucleic acids encode them. The vendor will present the tokens to the issuer who will redeem the tokens for their monetary value. Cloning vectors incorporating the above DNA constructs and cells transformed with the vectors and host cells containing such vectors are also provided. When the mold frame is disposed on the side wall, the side edge of the mold frame leans against the stopper, and the positioning post of the mold frame is embedded in the positioning hole. The test sample and the reference sample are analyzed in an identical sequence in each step of the method.