VGLUT1 primarily labels Ia afferents from dorsal root ganglia sensory neurons to provide excitatory proprioceptive feedback to large alpha MNs that are most vulnerable to degeneration in ALS (Todd et al. 2003; Kaplan et al. 2014; Comley et al. 2015; Nijssen et al. 2017; Lalancette‐Hebert et al. 2016; Ni et al. 2014). Here, SLC17A7 is linked to amyotrophic lateral sclerosis.