Re: CD45 Negative PBL

Dennis_Young@CIS.ucsd.edu
Fri, 7 Mar 1997 09:46:00 -0800

1- Are these really cells - have you SORTED them and looked under the
microscope? There are CD45 DIM events (debris?) that could be sticking to
your cells.
2- What sort of frequency are these events?
3- Are they positive for other markers?

I don't use this clone, so I couldn't say if it's clone specific.

Dennis
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* Dennis J. Young Voice : (619) 822-0407 *
* Flow Cytometry Core Facility FAX : (619) 822-0412 *
* University of California, San Diego USA e-mail: djyoung@ucsd.edu *
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______________________________ Reply Separator _________________________________
Subject: CD45 Negative PBL
Author: markrehse@CellPro.com at @UCSD
Date: 3/6/97 9:42 AM

Dear Flow Community,
We use CD45 FITC (Immunotech clone J33) in our two color
immunophenotyping panels to identify the WBC component in apheresis
and buffy coat and eliminate RBC's, debris and dim staining platelets
from subsequent enumeration of T and B cells, stem cells, NK cells,
monocytes and granulocytes using PE-conjugated antibodies. This
method is superior to traditional light scatter gating, however, there is a
population of CD45- cells which are equivalent in size and granularity to
T and B cells which we have not yet been able to identify in our panels.
Does anyone have experience with this population? Is it a problem with
this clone?
Thanks in advance.
MarkRehse@CellPro.com

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