 autoradiograph studi cell migrat ey len epithelium normal alloxan diabet rat lens normal alloxan diabet rat cataract investig autoradiographi 4 hour 4 dai 8 dai intraperiton inject h3-thymidin 0 4 uc bodi weight rat diabet 8 dai prior inject thymidin ag 4 week posit label nuclei len epithelium grain number count diabet rat lower frequenc label nuclei control 4 hour grain count equal frequenc diagram label nuclei three experiment period predomin peak appear 4 hour distanc 30-60 cell front nuclear arc success shift area observ longer experiment period shift peak restrict diabet anim result best interpret increas time cell gener appendix histotechniqu ey len collabor gertraud moewi 