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Imaging Frema594 in the sphenopalatine and superior cervical ganglia. (a) Saline injections produce no fluorescent labeling in these autonomic ganglia. (b) At 1 week post injections, Frema594 produce selective (red only) labeling in extracellular spaces surrounding cell somas, blood vessel walls and perineural tissue that envelops these ganglia. Scale bar = 100 µm.
