In a survey on 2405 placentae of different ethnic origin evidence for at least 11 different mutated alleles at Pi locus was obtained by identifying 60 rare variants of human placental alkaline phosphatase. An attempt has been made to compare our results with those previously reported in the literature.
Palmarino, R; Corbo, R M.; Scacchi, R; and Lucarelli, P
"Human Placental Alkaline Phosphatase: Analysis of Genetically Determined Rare Variants,"
3, Article 9.
Available at: https://digitalcommons.wayne.edu/humbiol/vol51/iss3/9