- Adenosine triphosphate binding cassette (ABC) transporters are expressed and regulated during terminal keratinocyte differentiation: a potential role for ABCA7 in epidermal lipid reorganization. Kielar, D., Kaminski, W.E., Liebisch, G., Piehler, A., Wenzel, J.J., Möhle, C., Heimerl, S., Langmann, T., Friedrich, S.O., Böttcher, A., Barlage, S., Drobnik, W., Schmitz, G. J. Invest. Dermatol. (2003)