ABCG2 and lamellar ichthyosis: The ABC transporter ABCA12 is known to transport glucosylceramide into maturing eLBs, and mutations in ABCA12 result in pathologies like severe lamellar ichthyosis, Harlequin-type ichthyosis, and other diseases, indicating the importance of lipid import during the eLB formation (reviewed in Akiyama, 2011, 2014; Scott et al., 2013).