Expr521
Expression in touch-sensitive neurons, motor neurons, and interneurons which starts in the 2-fold embryo and disappears by L3. Sporadic expression seen in retrovesicular ganglion at L1. Expressed in ALM, PLM and BDU cells at 2-fold embryo, L1 and L2. In AVM, PVM cells at L1 and L2. Expressed in ventral cord motor neurons VA2-VA12, VB1-VB11, AVF cells, and precursors at L1 and L2.
Expr1590
Expression by Larval Ventral Cord Motorneurons: Postembryonic motorneurons VA2 to VA12 and VB3 to VB11 express UNC-6::HA in the ventral nerve cord. Netrin becomes detectable in these cells soon after their births at the end of the first larval stage. This expression continues through the adult stage. After hatching, the C. elegans larva increases about 5-fold in both length and circumference before becoming an adult. Six axons (AVAL, AVAR, AVBL, AVBR, AVG, and PVQR) in the right longitudinal tract and one axon (PVQL) in the left tract provide a continuous source of UNC-6 in the ventral nerve cord. Near the end of the first larval stage, the twenty postembryonic motorneurons (VA2VA12, VB3VB11) provide a further source of UNC-6 in the right tract. These motorneurons could maintain and sharpen the proposed gradient of netrin in the basement membrane of the epidermis and skew its peak farther to the right of the ventral midline.