[Neuroscience] which dye do I choose? It shouldnot cross the synapse , and keep the fluorescence for a long time (a few months)?

kongzd from gmail.com via neur-sci%40net.bio.net (by kongzd from gmail.com)
Thu Dec 4 14:51:15 EST 2008

my experiment is transplanted the neurons to the nerve tissue of host.
Now I want to observe the synapse between the transplanted neurons and
host neurons. So before transplantation, i go to find a dye to
staining the  transplanted neurons.
this dye shouldnot cross the synapse,so I can obsevre the synapse in
electron scope.
and the experimentsin vivo lasts a long time ,I want to it keep the
fluorescence for about 4 month.

is there a dye recommended? does DiI or Dio meet the requirement? I
really donnot konw if DiI can cross the synapse.
thank you.

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