你要么试试下面这个方法:
Cells were counted, washed, and fixed in 70% EtOH 30% sorbitol. Samples were then treated with 1µM RNase A (Sigma, St. Louis, Missouri) in 50mM sodium citrate at 37° for 30 min., and stored at 4 C Prior to analysis, cells were stained with 1µM SYTOX Green
[文献出处:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2586416/]