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Mouse lymphoma L1210 cells (NCI line) that have low ability to take up cystine became deficient in cellular cysteine and glutathione in normal culture media. The cells entered the resting state during culture when they were seeded at high cell densities. They remained viable and were mostly present in the G1 or G0 phase. In the growth-arrested state, the cellular glutathione content was one order of magnitude lower than in the exponentially growing phase in the presence of 2-mercaptoethanol. In the arrested state, DNA synthesis was almost inhibited, and RNA and protein synthesis decreased markedly. Transfer of the cells to medium containing 2-mercaptoethanol, which improves the utilization of cystine by these cells, produced the rapid recovery of RNA and protein synthesis. DNA synthesis slowly increased, reaching a maximum after a lag period.

Mouse lymphoma L1210 cells can be arrested in the G1 phase by adjusting cellular cysteine and glutathione.