Neuronal Tracing dyes

[D.J.Brownlee]

  I am currently trying to label invertebrate neurones with various
  dyes-- DiA, DiO, DiQ, in addition to fluorescein have all been
  mentioned as possible candidates.  Are there other probes also??
  Who, other than Molecular Probes supply these reagents?
  I've come across a company from Austria called LAMBDA GMBH, but do
  not have address, tel. etc. details for them.
  
  Can anyone help.
  
  Many thanks
  
  djab at soton.ac.uk