Fig. 8. The dorsal M72 glomeruli are retained in O/E3^GFP/GFP homozygous mice. The tau-lacZ reporter-tagged receptor M72 converges to a single lateral glomerulus in O/E3^GFP/+ and O/E3^GFP/GFP homozygous animals. The bulb was mounted, GFP was imaged by confocal microscopy and the bulb stained to visualize lacZ-containing axons. An overlay of the two images, registered with landmarks in the bulb, reveals that the M72 glomerulus is present in O/E3^GFP/GFP homozygous mice.