Photomicrographs of the distribution ofLmo1 (A, D, G–I),Lmo2 (B, E), andLmo3 (C, F) mRNAs in the hippocampus of untreated mice as detected by in situhybridization with three 35S-labeled oligonucleotide probes and exposure of tissue sections to radiographic film (A–C) or by dipping in photographic emulsion (D–I). D–F, Note the heavy and even labeling of pyramidal neurons with all three probes in the CA1 region of the hippocampus. G, Lmo1-labeled (arrow) as well as Lmo1-unlabeled (arrowhead) presumptive interneurons (i) are present in the stratum oriens (SO). H, Lmo1-labeled granule cells (G) in the dentate gyrus (DG). Arrow indicates aLmo1-labeled, small, potential radial astrocyte (r) at the base of the granule cell layer. I, Arrow indicates a Lmo1-labeled small cell in the inner molecular layer of the dentate gyrus (DG) likely to be an astrocyte (a), compared with a small, unlabeled cell (arrowhead). Scale bars: A–C, 200 μm; D–F, 15 μm; G–I, 12 μm.