Defects in the acid phosphatase ACPT cause recessive hypoplastic amelogenesis imperfecta.
Smith CE, Whitehouse LL, Poulter JA, Brookes SJ, Day PF, Soldani F, Kirkham J, Inglehearn CF, Mighell AJ. Eur J Hum Genet. 2017 Aug; 25(8):1015-1019. Epub 2017 May 17.