1. Mitsubishi Kasei Institute of Life Sciences (T.O., T.T.) Tokyo,194–8511, Japan
2. Laboratory of Functional Genomics (T.O., Y.S.), Human Genome Center The Institute of Medical Science University of Tokyo Tokyo 108-8639, Japan
3. Laboratory of Veterinary Physiology (G.W.) Tokyo University of Agriculture and Technology Tokyo 183-8509, Japan