- Evidence for association of schizophrenia with genetic variation in the 8p21.3 gene, PPP3CC, encoding the calcineurin gamma subunit. Gerber, D.J., Hall, D., Miyakawa, T., Demars, S., Gogos, J.A., Karayiorgou, M., Tonegawa, S. Proc. Natl. Acad. Sci. U.S.A. (2003)