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An estimation of cell kinetic parameters was made by simultaneous flow cytometric measurements of DNA and bromodeoxyuridine (BrdUrd) contents of cells. The procedure described in this paper involves the incorporation of BrdUrd by S phase cells, labeling the BrdUrd with an indirect immunofluorescent technique using a monoclonal anti-BrdUrd antibody, and staining DNA with propidium iodide (PI). The amount of incorporated BrdUrd in HeLa cells was proportional to that of synthesized DNA through S phase. For all cell lines examined, the pattern of BrdUrd incorporation was essentially the same and the rate of DNA synthesis during S phase was not constant. The bivariate BrdUrd/DNA distributions showed a horse-shoe pattern, maximum in the mid S phase and minimum in the early and late S phases. Furthermore, the durations of cell cycle (Tc) and S phase (Ts) were estimated from a FLSm (fraction of labeled cells in mid S phase) curve that was generated by plotting the percentage of BrdUrd pulse-labeled cells in a narrow window defined in the mid S phase of the DNA histogram. The values of these parameters in NIH 3T3, HeLa S3, and HL-60 cells were in good accordance with the reported data. This FCM method using the monoclonal anti-BrdUrd antibody allows rapid determination of both cell cycle compartments and also Ts and Tc without the use of radioactive DNA precursors.
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Nihon Geka Gakkai zasshi,
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K Sasaki, and
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K Sasaki, and
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K Sasaki, and
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November 1988,
Nihon Geka Gakkai zasshi,
K Sasaki, and
T Murakami, and
T Ogino, and
M Takahashi, and
S Kawasaki
January 1992,
Cytometry,
