
The percentage of dead cells can be calculated from the fluorescence above as:

Determining Absolute Numbers of Live and Dead Cells Using a The total number of cells in a sample can be counted by killing all of the 6.2), labeling with a saturating concentration of PI and measuring nm. The fluorescence intensity is then linearly related to the total number in the sample. This may be done at the end of a set of viability experiments express cell viability in terms of absolute numbers of live and dead cells. 9.1 Perform the cell-viability measurements (described in Fluorescence

10.6 As soon as possible after the incubation stained cells by flow cytometry using 488 fluorescence emission for calcein (i.e., 530/30 for PI (i.e., 610/20 bandpass). Gate on cells to cells, perform standard compensation. The population live cells will show green fluorescence and dead