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. 1979 Jan;76(1):358–362. doi: 10.1073/pnas.76.1.358

Relationship between RNA content and progression of lymphocytes through S phase of cell cycle.

Z Darzynkiewicz, D Evenson, L Staiano-Coico, T Sharpless, M R Melamed
PMCID: PMC382938  PMID: 284352

Abstract

A flow cytometric technique for simultaneous measurements of RNA and DNA in individual cells has been applied to correlate the content of cellular RNA with the rate of progression of cells through the S phase. Human peripheral lymphocytes stimulated with phytohemagglutinin were blocked at the G1/S phase boundary by hydroxyurea or 5-fluorodeoxy-uridine treatment. Cells in the G1 phase as well as cells blocked at the G1/S phase boundary showed high heterogeneity with respect to stainable RNA content. After release from the block, the cells traversed the S phase at rates proportional to the quantity of stainable RNA per cell. Cells with the highest RNA content completed DNA replication 5 hr after release from the block; the cells with minimal RNA traversed the S phase at one-fifth of this rate. The large intercellular variation in stainable RNA and length of the S phase may be due to functional heterogeneity in the lymphocyte population. Our results suggest a correlation between the number of ribosomes and the rate of DNA replication in lymphocytes.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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