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Copper content of H460 tumor samples ± high-dose PSP-2 based on the fresh or dry weight (A). Linear correlations between total copper content and fresh weight (top) or dry weight (bottom) of individual tumor samples treated either with PSP-2 (B) or without PSP-2 (C). Key: ns = not significant; bFW = based on fresh weight; bDW = based on dry weight; R2 = correlation coefficient.
