[Histonet] Any fixative to reduce background in immunofluorescence?

From:"Tan, MinHan"

I am preparing to do some immunofluorescence staining in kidney tissue
with cd31.
Some preliminary work in formalin fixed paraffin embedded tissue has
yielded quite significant background fluorescence. 
A colleague suggested that I use frozen tissue, but the morphology is
quite unacceptable. 
Another colleague suggested paraformaldehyde, but that is really
inconvenient (preparing this every morning!?)
Any advice on a good commercial fixative for this purpose, that doesn't
destroy vessel antigens?


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