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Effects of Opuntia polysaccharides on cell viability. Murine J774.A1 macrophages were incubated for 24 hr with the indicated concentrations of Opuntia polysaccharide fractions, and cell viability was determined using a luminescent cell viability assay kit, as described. Values are the mean ± S.D. of triplicate samples from one experiment, which is representative of two independent experiments.
