60mw is plenty to excite the dye and define a Hoechst low population. I am currently using an Enterprise laser at 50mW to sort SP cells at speeds of 5-6000 per second. You may wish to look at the dye concentration and time of loading as parameters . Charles A. Kuszynski, Ph.D. Assistant Professor/Director Cell Analysis Facility University of Nebraska Medical Center 986495 Nebraska Medical Center Omaha, NE 68198-6495 402 559-6267 voice 402 559-4077 fax ckuszyns@unmc.edu
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