Some polymorphic enzymes from Andhra Pradesh. 
Phenotype and gene frequency distributions of placental alkaline phosphatase, esterase D and glyoxalase I among some population groups of Hyderabad, South India are reported.  The Pls, Plf, Pli gene frequencies of placental alkaline phosphatase range from 0.725 to 0.76, from 0.16 to 0.19 and from 0.07 to 0.096 respectively.  The EsD2 gene frequency ranges from 0.25 to 0.29 and the GLO1 gene frequency ranges from 0.252 to 0.327.