[IMPERIAL COLLEGE PRESS Proceedings of the Final Symposium of the Tohoku University 21st Century Center of Excellence Program - Sendai International Center, Japan (7 – 9 January 2007)] Future Medical Engineering Based on Bionanotechnology - THE RAT Small eye HOMOZYGOTE (rSey 2 /rSey 2 ) CAN BE REGARDED AS A Pax6 NULL MUTANT