F ig.4 N eutral gel electrophoretic analysis ofDNA fragm entation in retinas from norm alrabb its(L ine 1)and experim ental rabb its of 6h,1d,3d after laser exposure(L ine 2,3,4respectively).

• 标题： 图4视网膜组织细胞DNA凝胶电泳。1道为正常视网膜组织,2、3、4分别为照后6小时、1天和3天组,照射组出现DNA ladder。