- A mannosyltransferase gene at 11q23 is disrupted by a translocation breakpoint that co-segregates with bipolar affective disorder in a small family. Baysal, B.E., Willett-Brozick, J.E., Badner, J.A., Corona, W., Ferrell, R.E., Nimgaonkar, V.L., Detera-Wadleigh, S.D. Neurogenetics (2002)