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Expression of p53, bax and bcl-2 in the HeLa cells. HeLa cells were treated with 0.01–0.03 mg/ml of aspartame for 48 h. Expressions of p53, bax and bcl-2 mRNA are related to GAPDH and presented as fold. Relative expression values are the normalized mean ± SEM, n = 6. *p < 0.05.
