Figure 5.
osm-9:: GFP fusion genes are expressed in a subset of sensory neurons. A,
osm-9:: GFP fusion genes. Three regions that regulate GFP expression in particular cell types are indicated. Allosm-9:: GFP fusion genes were examined in at least three independent transgenic lines. B, A lateral view of the head of a transgenic animal expressing theosm-9:: GFP2 fusion gene. GFP is expressed in the four OLQ mechanosensory neurons and in the AWA and ADL amphid chemosensory neurons. All neurons are bilaterally symmetric, and only those on the left side are visible in this focal plane. The fusion protein is present at high levels at the base of the OLQ cilia, but it is only weakly expressed in the cilia themselves.C, A lateral view of the head of a transgenic animal expressing the
osm-9:: GFP3 fusion gene, which encodes a GFP-tagged OSM-9 protein. GFP is localized to the OLQ and AWA cilia at the tip of the nose (arrows), but little GFP is present in the cell bodies, axons, or dendrites. ADL expression is weaker or absent in these lines. The fusion gene deletes the last 105 amino acids of OSM-9; when GFP is fused to the last amino acid of OSM-9 (
osm-9:: GFP4), a similar but fainter expression pattern is observed. D, A lateral view of the head of a transgenic animal expressing theosm-9:: GFP5 fusion gene. GFP expression is present in the OLQ and IL2 sensory neurons and in the AWA, AWC, ASE, ADF, ASG, ASH, ASI, ASJ, ASK, and ADL amphid chemosensory neurons. In more posterior parts of the animal, the FLP, PVD, PHA, and PHB sensory neurons, the ventral uterine cells, and the rectal gland cells also express
osm-9:: GFP5.