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RGD peptide effects on glioma cell proliferation. A panel of glioma cells were assayed when incubated with fresh medium, or that containing scrambled non-RGD peptide (Scr) or RGD peptide. The relative metabolic activity was determined by an in vitro colorimetric method. The mean of the absorbances obtained at 562 nm from supernates harvested from triplicate wells ± SE is shown at 1, 3, 6 and 8 days.
