To specifically investigate the phosphorylation status of CRMP1 in ALS spinal cords, we used anti–pThr509-CRMP1 antibody raised against mouse/rat CRMP1 (503–515) peptide (Figure 1A) instead of the commonly used phospho-antibody against Ser522-CRMP1/2, which is an identical phosphorylation consensus motif for CRMP1 and CRMP2. Here, CRMP1 is linked to amyotrophic lateral sclerosis.