Best blocker?

Joanne Lannigan joannelannigan at
Mon Nov 7 11:09:17 EST 2005


You do not say what type of human cells these are. If you are trying to
block FcR binding then serum is not saturating enough to block all FcR and
you would be better off using purified goat IgG at a final concentration of

Joanne Lannigan, MS

Director, Flow Cytometry Core Facility

University of Virginia

Jordan Hall, Room 7067

P.O. Box 800734

Charlottesville, VA 22908-0734

Office: 434-924-0274

Lab: 434-243-2695

Fax: 434-982-1071

email: joannelannigan at

-----Original Message-----
From: Mark D'Amico [mailto:MDAmico at] 
Sent: Friday, November 04, 2005 11:03 AM
To: cyto-inbox
Subject: Best blocker?

I am using a secondary (goat anti-mouse IgG-PE). I am running the secondary
with the cells (human) alone as one of my controls and get a bit more
binding than I'd like. The incubation takes place in 2% serum ( I have used
bovine and human) with similar results. Should I try mouse serum for the
secondary incubations only?

Mark D'Amico, Ph.D.


Panacea Pharmaceuticals

207 Perry Parkway    #2

Gaithersburg, MD   20877

(240) 243-8000 Ext. 206

mdamico at

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