Patent ID: 8163525

Claim:
A transformant that is transformed with at least one selected from the group consisting of the Schizosaccharomyces pombe DPS gene, the human DPS1 gene and the mouse SDS1 gene; and a DNA defined under (a) or (b): (a) a DNA encoding a protein which has the amino acid sequence of SEQ ID NO: 2; (b) a DNA encoding a protein which has the amino acid sequence derived from the amino acid sequence of SEQ ID NO: 2 by deletion, addition, insertion or substitution of one amino acid thereof, wherein the DNA defined under (a) or (b) enables or enhances the activity of the Schizosaccharomyces pombe DPS gene, the human DPS1 gene and/or the mouse SDS1 gene in a cell of a host organism, and wherein the Schizosaccharomyces pombe DPS gene is amplifiable using polymerase chain reaction (PCR) primers of SEQ ID NOs: 13 and 14, the human DPS1 gene is amplifiable with PCR primers of SEQ ID NOs: 15 and 16, and the mouse SDS1 gene is amplifiable with PCR primers of SEQ ID NOs: 17 and 18.