1. Department of Applied Biological Chemistry (J.I., K.Y., E.I., S.-i.S., M.S., R.S.), Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan;
2. Department of Nutrition and Food Science (Y.F.), Ochanomizu University, Tokyo 112-8610, Japan;
3. National Institute of Health Sciences (T.N.-M.), Tokyo 158-8511, Japan