ABCD1 and X-linked adrenoleukodystrophy: ABCD1, one of these ABC-transporters, previously called ALDP, causes X-linked adrenoleukodystrophy in man (Berger and Gartner, 2006) and plays a role in the peroxisomal uptake of very long chain fatty acids and/or their CoA-esters (van Roermund et al., 2008).