Cell cycle analysis on M1-V1 and M1-G1 cells during the culture with recombinant human (rh) interleukin 6 (IL-6).

M1-V1 and M1-G1 were cultured with 20 ng/mL of rhIL-6, and the cultured cells were subjected to propidium iodide staining at the time indicated. DNA content was analyzed on FACSort. Cell cycle analysis was performed with the program Modfit LT2.0.