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Tannic acid treatment affects cell numbers. Three human breast cell lines (a) MCF10A, (b) MDA-MB-231, and (c) MCF7 were treated with 10%, 1.0%, and 0.1% TA cross-linked beads for 24 and 48 h. The remaining cells were counted. n = 3, *P < 0.02, and error bars = SE. NT: no treatment.
