“…Since it was shown by Chen and Giblett [1971] that human red cell sGPT exhibited genetic polymorphism, many authors have reported data on the distribution of two common alleles, Gpt1 and Gpt-, in popula tions of various ethnic groups [Kômpf, 1971;Chen et al, 1972;Brinkmann et al, 1972;Seth, 1974;Ishimoto and Kuwata, 1974;Olaisen, 1975;Welch et al, 1975;Blake, 1976]. So far, the Gpt1 frequency has been found to be higher among individ uals of African, Papuan and Australian ori gins than among those of other ethnic groups.…”