- A mutation of the Wilson disease protein, ATP7B, is degraded in the proteasomes and forms protein aggregates. Harada, M., Sakisaka, S., Terada, K., Kimura, R., Kawaguchi, T., Koga, H., Kim, M., Taniguchi, E., Hanada, S., Suganuma, T., Furuta, K., Sugiyama, T., Sata, M. Gastroenterology (2001)