PGM types were determined in 695 Whites and 1,032 Blacks from Porto Alegre, as well as in 38 Xikrin Indians of northern Brazil. Whites showed a higher prevalence of PGM21 than Blacks, the frequency of this marker being 0.26 among the Indians. No lack of heterozygotes was observed in this system, in disagreement with findings from two other reports. Two rare phenotypes were found, classified as PGM] 6-2 and PGM] 3-1. The Whites were all homozygotes for PGM12, its allele PGM22 showing a frequency of 0.01 among the Blacks and also occurring among the Indians, may be due to racial admixture. A “null” allele at this locus was also discovered as a result of an apparent maternity exclusion.
Silva, Rosilda S.; Weimer, Tania A.; and Salzano, F M.
"Rare and Common Types of Phosphoglucomutase in two Brazilian Populations,"
2, Article 5.
Available at: https://digitalcommons.wayne.edu/humbiol/vol53/iss2/5