- A gene on chromosome 11q23 coding for a putative glucose- 6-phosphate translocase is mutated in glycogen-storage disease types Ib and Ic. Veiga-da-Cunha, M., Gerin, I., Chen, Y.T., de Barsy, T., de Lonlay, P., Dionisi-Vici, C., Fenske, C.D., Lee, P.J., Leonard, J.V., Maire, I., McConkie-Rosell, A., Schweitzer, S., Vikkula, M., Van Schaftingen, E. Am. J. Hum. Genet. (1998)