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Flavonoids in A. conyzoides induced significant S phase arrest in HeLa cells. (a) Cell cycle analyses in HeLa cells upon the administration of increasing doses of flavonoids (50, 100, 200, 300, and 400 μg/mL) using a flow cytometer. (b) Statistical analyses of the proportion of HeLa cells during G1, S, and G2/M phases, respectively (∗P < 0.05, compared to control).
