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Cross resistance of A24cisPt8.0 and (D-)A24cisPt8.0 cells towards pemetrexed. Cells were seeded at densities of 2–8 × 104 mL−1 and subsequently grown in medium containing pemetrexed (0–0.32 µM). Cell densities were measured after three days. (-●-), A24cisPt8.0 (-●-), (D-)A24cisPt8.0 (-○-). Data are presented as mean ± SD. n > 10.
