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Some cells in the preoptic area express kiss1r but not gnrh1. Photograph in the preoptic area of a non-territorial male stained for gnrh1 mRNA with DIG (large cells) and kiss1r mRNA with 35S-labeled probe (small black dots). GnRH1 neurons are indicated with arrows. Clusters of silver grains representing non-GnRH1 neurons in the POA are indicated by arrowheads. Scale bar represents 50 μm.
