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. 2006 Sep 26;95(8):1056–1061. doi: 10.1038/sj.bjc.6603384

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Copyright © 2006 Cancer Research UK

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p16 and p21 expression in successively passaged breast cells. Histograms show the relative gene expression for p16 and p21 relative to 18 s rRNA expression in primary cell cultures and immortalized breast cell lines. Data is plotted as means±s.em.