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DNA damage (% DNA in tail) measured by comet assay in A) HaCaT cells, B) NRK cells, C) Isolated lymphocytes; treated for 24 hr with 100 nM kinetin, and 30 min with 0.6 μM NQO and the combination of both. Anti-apoptotic activity of kinetin in D) HaCaT cells, E) NRK cells treated for 24 hr with 100 nM kinetin, 8 hr with 10 μM Na-arsenite and the combination of both using Annexin V staining. * = significantly different from control, 0 = significantly different from NQO.
