Kimmo, You will not see red fluorescence with Hoechst 33342 with the configuration of 2 PMT UV, 3 or 4 PMT Argon and 1 PMT He-Ne. The red fluorescence is too high for dichroic to reflect to PMT for UV. You need to be able to collect this signal in PMT usually dedicated to Argon or He-Ne laser. There is no pinhole for UV fluorescence in these channels. You need a custon configuration which may be achieved if you cantact Becton Dickinson. David David M. Dombkowski dombkowski@helix.mgh.harvard.edu Flow Cytometry-Pathology-CNY rm7017 149 13th Street Massachusetts General Hospital-East Charlestown, MA 02129 Tel. (617)726-1683 Fax.(617)724-3164
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