However, some mutations result in a truncated ALDP lacking the N-terminus, which allows partial function and correct peroxisomal localization—these mutations have been exclusively associated with adrenomyeloneuropathy (a milder neurological phenotype that presents at an older age) rather than cALD, suggesting that residual ALDP activity may influence phenotype (10). The gene discussed is ABCD1; the disease is adrenomyeloneuropathy.