Abstract:In order to test a mathematical model of G1/S-phase transition, the proliferative response of the murine myeloid interleukin 3 (IL-3) dependent cell line NFS-78 to graded reduction of IL-3 levels was measured. Exponentially growing cells were exposed to bromodeoxyuridine (BUdR), which replaces thymidine (TdR) in the DNA double strands during DNA synthesis. After incubation periods ranging from 3 to 36 h the cells were fixed and stained with a fluorescence dye mixture of Hoechst 33258 and ethidium bromide (EB) … Show more
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