- Adenine phosphoribosyltransferase-deficient mice develop 2,8-dihydroxyadenine nephrolithiasis. Engle, S.J., Stockelman, M.G., Chen, J., Boivin, G., Yum, M.N., Davies, P.M., Ying, M.Y., Sahota, A., Simmonds, H.A., Stambrook, P.J., Tischfield, J.A. Proc. Natl. Acad. Sci. U.S.A. (1996)