Dear flowers, What is the best way to perform a viability assay using flow cytometry? I am currently using calcein AM and propidium iodide (PI). I substituted the ethidium homodimer with PI only because PI appears to be a common indicator of dead cells in flow cytometry and it is less expensive. For those of you who have FACS Vantages, is it possible to compensate between FL1( Calcein) and FL3 ( PI) in your systems? For some reason, I do not see distinct populations of cells when I use the previously mentioned stains. In fact, I see a population that appears to be positive for PI and positive for calcein based on controls ( live cells: calcein only and Etoh fixed cells: PI only). All responses are appreciated. Steve
This archive was generated by hypermail 2b29 : Sat Mar 10 2001 - 19:31:18 EST