Fig. 2

Distribution of the % tail DNA of the total number in corneal epithelial cells (n = 3). The eyes were treated with an ocular instillation of ethidium bromide, 1,1′-dimethyl-4,4′-bipyridinium dichloride (paraquat) in the Test 1 (a), methyl methanesulfonate (MMS), acrylamide in the Test 2 (b), or 4-nitroquinoline 1-oxide (4-NQO) in the Test 3 (c). For the negative controls, saline (a, b) and 5 % DMSO (c) were administered in the same manner