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Western blot analysis of protein expressions in L5178Y cells after exposure to Ginkgo biloba leaf extract (0.4—1.2 mg/ml), quercetin (10–100μM), and kaempferol (10–200μM). Total cellular protein was extracted after 4-h treatment. The levels of different proteins in response to DNA damage were detected by Western blot analysis. β-actin was used as a loading control. Similar results were obtained from at least three independent experiments.
