想请教下关于做细胞周期的问题,我们使用的是小鼠MEF细胞,用的是DAPI染色(由于后续实验需要只能使用DAPI染色),实验步骤见下方。同时我们也做了PI染色进行对比。现在发现的问题是加大激光强度,看不到明显的峰,然后最后得到的周期的图也很难看。不知道是染色的问题,还是仪器操作的问题,我们用的仪器是BD FACSAria II特殊定制型,跑CST的话是发现蓝色激光CV值有点大。
希望得到解答,谢谢了。
DAPI 染色
PI染色
Cell Cycle Staining Protocol-DAPI
1. Harvest cells- wash 2X in PBS to get rid of serum proteins. 1200rpm, 5 min
2. Resuspend pellet (up to 3x106 cells) in 1.2 ml PBS (Ca and Mg free).
3. Add 3.0 ml ice cold 95% EtOH dropwise while vortexing. This crosslinks proteins.
4. Fix in this final 70% EtoH solution for at least 30 min
5. Decant, and wash again in 15mL PBS; continue spinning at 2000-2200 rpm for 10 min.
6. Count cells
7. Resuspend in 1.5-2.0ml DAPI stain solution (final concentration of 1x106 cells/ml) and incubate for 30 min at 4degrees or on ice.
DAPI Stain Solution 0.1%TritonX 100 in 10ml PBS add 100ul of 1mg/ml DAPI to the 10ml TritonX solution
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