Fig. 2.

Knockdown of zfGrx2 suppressed formation of a neuronal network. Morpholino-induced knockdown of zfGrx2 led to loss of early HuC/D positive neurons between 22 and 24 hpf (A). As demonstrated by different techniques, all tested neuronal subgroups were affected at 24 hpf: glutamatergic excitatory interneurons, dopaminergic neurons, and secondary motor neurons (B). Embryos lacking zfGrx2 were not able to develop an axonal scaffold (C). Ac, anterior commissure; dlt, dorsal longitudinal tract; nMLF, nucleus of the medial longitudinal fascicle; poc, posterior commissure; tg, trigeminal ganglion; vlt, ventral longitudinal tract. Scale bar, 50 μm.