background subtraction with Indo-1

From: Justin Fishbaugh (justin-fishbaugh@uiowa.edu)
Date: Mon Nov 08 1999 - 11:09:33 EST


Greetings,

We are running Indo-1 for calcium flux plus PE and PE-Cy5 for surface
markers on an EPICS 753.  When samples are run that have been incubated
with a drug of interest, we get a higher baseline reading for the indo-1
ratio.  If we can prove that the drug is causing the higher baseline
through increased background fluorescence in one of the indo-1 channels, is
it proper to normalize the ratio baseline by either adjusting PMT voltages
or sliding the mean ratio histograms so that the baselines match or none of
the above?  Thanks.


------------------------------------------------
| Justin Fishbaugh                             | 
| University of Iowa                           |
| Flow Cytometry Facility                      |
| 48 EMRB                                      |
| Iowa City, IA  52242                         |
|                                              |
| justin-fishbaugh@uiowa.edu                   |
| http://www.medicine.uiowa.edu/flowcytometry/ |
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