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.