RE: [Histonet] CD21, B220, CD4

From:Kristen Broomall


We've been using CD4 & CD8 on FFPE tissues with not much problem.

They are from Neomarkers (

CD4 Ab-8

CD8 Ab-1

Kristen Broomall, HT (ASCP)

-----Original Message-----
From: Gayle Callis []
Sent: Monday, January 10, 2005 5:01 PM
To: Elizabeth Chlipala;
Subject: Re: [Histonet] CD21, B220, CD4


As discussed many times on Histonet, CD4 will NEVER work on FFPE!  FYI, CD8 
also will not work.

If you have to run all these antibodies on the same sample, you will have 
to do frozen sections in order to accomadate the CD4.  FS are air dried 
overnight at RT over dessicant.   To improve morphology, use 75% 
acetone/25% absolute ethanol (no substitute on alcohol here) for 5 min at 
RT next day.  Do NOT air dry again, go directly from fixative to buffer and 
then stain.  We actually use biotinylated primaries more than purified, 
then come back with Strepavidin-HRP, then DAKO AEC+ or Chris van der Loos 
AEC - his formulation is excellent inhouse chromogen.  Using biotinylated 
primaries shortens a protocol!

We buy all antibodies, monoclonals from BD PharminGen.  SEROTEC is another 
supplier.  These are rat antimouse monoclonals.

At 01:59 PM 1/10/2005, you wrote:
>I need to run these antibodies on mouse tissue.  Can anyone recommend me
>a good source and if they might possibly work in FFPE tissue or do I
>need to use frozens.
>Elizabeth A. Chlipala, BS, HTL(ASCP)QIHC
>Premier Laboratory, LLC
>P.O. Box 18592
>Boulder, Colorado 80308
>Office: (303) 735-5001
>Fax: (303) 735-3540
>Ship to Address:
>Premier Laboratory
>University of Colorado
>MCDB, Room A3B40
>Boulder, Colorado 80309
>Histonet mailing list

Gayle Callis
Research Histopathology Supervisor
Veterinary Molecular Biology
Montana State University - Bozeman
PO Box 173610
Bozeman MT 59717-3610
406 994-6367 (lab with voice mail)
406 994-4303 (FAX)

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