Adult born neurons express GABA and NC. 40× images of sagittal sections with arrowheads indicating double positive cells for BrdU (red) and the subtypes GABA and NC (green). Scale bars, 37 μm. (A and B) BrdU co-labels with GABA in the GLL (A) and the GCL (B). (C and D) BrdU co-labels with NC in the GCL (C) and TH (D) in the GLL. NC, N-copine; GLL, glomerular layer; GCL, granule cell layer.