- Coordinate expression of the autosomal dominant polycystic kidney disease proteins, polycystin-2 and polycystin-1, in normal and cystic tissue. Ong, A.C., Ward, C.J., Butler, R.J., Biddolph, S., Bowker, C., Torra, R., Pei, Y., Harris, P.C. Am. J. Pathol. (1999)