Long life-time fluorophore

From:Sven Terclavers

Hi listers,

First of all,
Sorry if some of you receive this email more than once, I'm sending this to 
3 mailinglists at the same time...
I have a question about a fluorophore.  I'm looking for a secondary 
fluorescent antibody that has a really long life-time.  The purpose is to 
inject fixed cells (staining before fixation) into a mice so I can measure 
the number of fluorescent cells in an organ after 60 days.  I was thinking 
about carboxyfluorescein, but does it really has a long fluorescent 
life-time and/or are there any better secundary antibodies?
Thank you in advance,

Sven Terclavers

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