Glucose phosphate isomerase and 6-phosphogluconate dehydrogenase polymorphism in Malaysian leaf monkeys

Glucose phosphate isomerase and 6-phosphogluconate dehydrogenase were found to be polymorphic in Malaysian leaf monkeys. Two glucose phosphate isomerase electrophoretic phenotypes were presumed to be homozygous. Three 6-phosphogluconate alleles and four electrophoretic phenotypes were present. The allele frequencies inPresbytis obscura werePgdA=0.64,PgdB=0.27 andPgdC=0.09. The frequencies of the 6-PGD phenotypes inP. obscura were not in accord with Hardy-Weinberg expectations. All the biochemical markers examined show identical electrophoretic patterns in the Malaysian leaf monkeys.