Fig. 3.

Emerging roles of miRNAs in olfactory system development. The drawings provide a schematic representation of olfactory system development, staring from the olfactory placode stage to the adult organization. The two blue circles on the top indicate the miRNAs that have been so far described as modulators of these events (see text for further details). VZ ventricular zone, IZ intermediate zone, MCL mitral cell layer, EPL external plexiform, ONL olfactory nerve layer, OE olfactory epithelium, GL glomerular layer