GPR151 is expressed in the habenular circuitry of zebrafish. A–D: Immunohistochemistry of coronal brain sections of adult zebrafish using a rabbit polyclonal antibody against human GPR151 yielded selective labeling of habenular axons projecting from the habenula (A), through the FR (B) to the dIPN and vIPN (C), as well as to the ventral median raphe (D). DAPI nuclear stain is shown in blue. For abbreviations, see list. Scale bar = 50 µm in A–D.
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