Adult dock1 MUT zebrafish-regenerated barbels are grossly indistinguishable from WT. (A–D) Maxillary barbels from uninjured 4-mo-old WT and dock1 MUT zebrafish (A and B) taken from the same fish and at the same time as 28-day regenerated control and dock1 MUTs (C and D) were harvested. (E–G) Quantifications from TEM micrographs (see Fig. 2) found no significant differences between genetic and experimental groups in the number of SC nuclei, total axon count, or axon size. n = 6 fish per genotype. (A–D) Scale bar = 1 mm. (E–G) One-way ANOVA with Brown–Forsythe test.