AAK1 and amyotrophic lateral sclerosis: Because transgenic mouse and rat models of SOD1-linked ALS with different SOD1 mutants have been well-established and both are phenotypically representative of ALS pathology [4], we chose SOD1G85R transgenic mouse and SOD1G93A transgenic rat lines to focus on examining the commonality of AAK1 expression in rodent spinal cords that are most relevant to ALS pathology.