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Fig. 4 Expression of sncb. sncb expression comes on the earliest of the three synuclein genes, beginning at the eight-somite stage. A: At the 10-somite stage. B: At the 13-somite stage, arrows indicate trigeminal placode. C: At the 14-somite stage, lateral view. D: At the 14-somite stage, dorsal view, arrows indicate trigeminal placode. E: At the 16-somite stage. F: At the 20-somite stage. G: At the 22-somite stage. H: At the 25-somite stage. vd, ventral diencephalon; vt, ventral tegmentum; op, olfactory placode. I: A the 25-somite stage. cg, cranial ganglia. J: At 45 hours postfertilization (hpf), lateral view. K: At 45 hpf, dorsal view. L: At 2 days postfertilization (dpf). M: At 3 dpf, lateral view. N: At 3 dpf, dorsal view.