Flow microfluorometric analysis of the cell cycle phase cytotoxicity of ARA-C

Mouse L1210 leukemia cells killed by ara-C, an anti-tumor agent widely used against leukemia, were demonstrated to be in the S phase of the cell cycle by flow microfluorometry. The point in S phase at which the L1210 cells died was shown to be dose dependent. At higher concentrations of ara-C cells died earlier in the S phase.