ABCD1 and X-linked adrenoleukodystrophy: The ALD mouse recapitulates the key biochemical features of ALD: fibroblasts generated from Abcd1 null mice have decreased VLCFA β‐oxidation capacity41 and tissues have elevated levels of VLCFAs39, 40, 41, 42 and lipid inclusions in adrenals, but not in the CNS.39