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Fig. 4

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ZDB-IMAGE-180822-56
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Figures for Gribble et al., 2018
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Fig. 4

lrp4 acts in a MuSK-independent pathway to promote axonal regeneration. a Lateral view of wild-type GFP-labeled motor nerve before laser transection at 5 dpf. Yellow dashed box indicates transection site, scale bar is 10 µm. b Forty-eight hours post transection, multiple axon fascicles have regenerated ventrally. Green arrowheads indicate regenerated fascicles. c Lateral view of musk mutant motor nerve before laser transection at 5 dpf. Yellow dashed box indicates transection site. d Forty-eight hours post transection, motor axons have regenerated ventrally. Green arrowheads indicate regenerated fascicles. e Lateral view of wild-type GFP-labeled motor nerve before transection. f Forty-eight hours post transection, multiple axon fascicles regenerate ventrally. Green arrowheads mark regenerated fascicles. g Lateral view of agrin mutant motor nerve before transection at 5 dpf. Yellow box indicates transection site. h Forty-eight hours post transection, agrin mutant motor axons have regenerated ventrally. Green arrowheads mark regenerated fascicles. i Quantification of nerve regeneration in wild-type siblings (n = 23 nerves from 11 larvae) and musk mutants (n = 17 nerves from 11 larvae) at 48 h post transection. musk mutant motor nerves regenerate as well as wild-type sibling motor nerves (Fisher’s exact test p = 0.4982). j Quantification of nerve regeneration in wild-type siblings (n = 10 nerves from 4 larvae) and agrin mutants (n = 17 nerves from 6 larvae). Agrin mutant motor nerves regenerate as well as wild-type sibling nerves (Fisher’s exact test p = 0.6125). k Schematic of the canonical Agrin-Lrp4-MuSK pathway critical for neuromuscular synapse formation

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