Type III Nrg1^+/− sensory axons have reduced numbers of Type III Nrg1⁺ punctae relative to WT sensory axons.

<p>(A) Conventional microscopic images of Type III Nrg1⁺ punctae (green) found along peripherin⁺ axons (blue) from WT and Type III Nrg1^+/− sensory cultures. Scale bars equal 10 µm. (B) Quantification of the average number of punctae per 100 µm axon length from 16 WT and 15 Type III Nrg1^+/− images. Comparison by genotype illustrates that Type III Nrg1^+/− sensory axons have significantly fewer Type III Nrg1⁺ punctae than WT sensory axons (Mann-Whitney Rank Sum test, *p<0.05).