Red cell enzyme and blood group polymorphisms in Turkey.

Baseline data from Turkey is presented on phenotype and gene frequency distributions of three red cell enzyme systems (ESD, PGM1, PG1) and two blood groups (ABO, Rh). Examination of the distributions of these gene frequencies among the four geographic regions of Turkey showed that except for ESD, the Turkish population is genetically homogeneous. The gene frequencies observed in Turkey are compared with those in some countries in Europe and Asia.