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Values are expressed as a ratio of either 0.4% or 1.0% DMSO control (see S1 and S2 Figs). Viability was measured by the colorimetric MTT assay using concentrations of 10-8, 10-7, 10-6, 10-5, 10-4M (lightest to darkest bars) in (a) TM4, (b) MSC-1, (c) 15P-1 immortalized Sertoli cell lines. * = p≤0.05; ** = p≤0.01; **** = p ≤ 0.0001; n = 3–5 plated in triplicate.
