Preventing Membrane Leakiness -- How To.

JOHN BOUCHER jbouch at
Thu Jan 3 22:34:10 EST 2008

Dear List:

Michael took the words right out of my mouth (see below).  I ,too,  
need to find a technique for overcoming the membrane leakiness caused  
by fixing RBCs (glutaraldehyde or formaldehyde).  As with Michael,  
improving the fixation technique to prevent/inhibit membrane pores,  
OR, "building" a fluorescent label larger than the pores so that they  
won't penetrate the membrane is a long sought goal.

Please, please, if you send a miracle answer to Michael, send a copy  
to me too.

John H. Boucher, DVM, PhD
Rheotech Labs, Inc.
Comparative Studies in Blood Rheology
2106 Salisbury Road
Silver Spring, MD 20910, U.S.A.

Phone:	301-585-1885
Email:	<jbouch at>
From:	 Michael Model <mmodel at>
Subject:	 plugging holes in cells
Date:	 January 2, 2008 1:59:12 PM EST
To: cyto-inbox

Dear List:

I am trying to do something to prevent penetration of a small (mw  
under 1,000) hydrophilic molecule into chemically fixed cells. The  
cells can be fixed with formaldehyde or glutaraldehyde for example,  
but that makes their membranes leaky, so I am looking for a way to  
either fix them without opening large holes or to somehow plug the  
holes afterwards. Does anyone have any experience that might suggest  
a possible approach?

Thanks in advance and happy New Year.

Michael Model, Ph.D.
Confocal Microscopy Core
Dpt. Biological Sciences
Kent State University
Kent, OH 44242
tel. 330-672-2874
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