Red cell enzyme markers in the Japanese of the Izena Island.

A genetic study was carried out on phenotype and gene frequencies of the genetic markers in four red cell enzymes, acid phosphatase (ACP1), esterase D (ESD), 6-phosphogluconate dehydrogenase (PGD) and phosphoglucomutase 1 (PGM1) among the Japanese population living on Izena Island of Okinawa Prefecture. The gene frequencies obtained were ACP1A = 0.284, ACP1B = 0.716, ESD1 = 0.436, ESD2 = 0.564, PGDA = 0.947, PGDC = 0.053, PGM11- = 0.112, PGM11+ = 0.602, PGM12- = 0.161, PGM12+ = 0.125. The population living on Izena Island is characterized by higher ACP1A and PGM12 gene frequencies than those of Tokyo population.