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Gγ8-tgOR OSNs innervate large and broadly distributed glomeruli. A–D, Whole-mount fluorescent images of the dorsal OB show projections of GFP-labeled OSNs expressing tgORs (A–C) or TetO-GFP (D) under the control of Gγ8-TTA. Note that OSNs expressing Gγ8-tgORs innervate many large glomeruli (A–C, insets), whereas Gγ8-GFP-expressing OSNs rarely enter the glomerular layer (D, inset). Scale bars: D (for A–D, 1 mm; insets, 250 μm. Medial (M) and anterior (A) directions are indicated.
