1. Department of Applied Genomics, Kazusa DNA Research Institute , Kisarazu, Chiba 292-0818 , Japan
2. Graduate School of Science and Engineering, Tokyo Denki University , Hatoyama , Saitama 350-0394 , Japan
3. Turritopsis Immortal Jellyfish Regenerative Biological Research/Experience Laboratory , Arita, Wakayama 643-0002 , Japan