Cell cycle analysis

From: Ken Fujise (kfujise@heart.med.uth.tmc.edu)
Date: Mon May 03 1999 - 15:59:31 EST


Dear Colleagues:

I have been doing cell cycle analysis and if you could help me with
following questions, I would be very much appreciative.

The system I have is to co-transfect HeLa cells with transfection marker
(GFP-F) and a gene of my interest on transient mammalian expression
vector (pFLAG) and harvest them at 16 hours, fix them with 70% MetOH at
-20C for 2 hours and stain with PI and do flow cytometry.

Recently, I have been getting clear difference in cell cycle
distribution patterns by eyes between control vector (pFLAG only) and my
gene. However, when I use ModLit program, the difference is not as
impressive. I am using Manual Fit: Frozen, Diploid, No aggregate,
Visible G2, No apoptosis. I gate the cells for GFP-F and I remove
aggragates using

Am I doing something wrong?

Thank you very much for your time and help.



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