- Considerable haplotype diversity within the 23kb encompassing the ADH7 gene. Han, Y., Oota, H., Osier, M.V., Pakstis, A.J., Speed, W.C., Odunsi, A., Okonofua, F., Kajuna, S.L., Karoma, N.J., Kungulilo, S., Grigorenko, E., Zhukova, O.V., Bonne-Tamir, B., Lu, R.B., Parnas, J., Schulz, L.O., Kidd, J.R., Kidd, K.K. Alcohol. Clin. Exp. Res. (2005)