The samples were tested using the ABO, phosphoglucomutase (PGM), erythrocytes acid phosphatase (EAP), and glyoxalase I (GLO) blood group systems. In both ethnic groups, the most frequent alleles in the ABO, PGM, EAP, and GLO systems were O, OGM 1+, EAP B, and GLO 2, respectively. However, the data revealed significant differences between the 2 groups, 19.4 percent of Africans compared with 33.5 percent of East Indians carry the ABO B phenotype and 62.7 percent of Africans compared with 33.5 percent of East Indians carry the EAP B phenotype. Using the chi square test, a comparison of the allele frequencies between different populations revealed a significant difference when the East Indians were compared with the Indians and the Pakistanis in the EAP system. Although the calculated matching probabilities appear quite large, they are effective in terms of discriminating between two randomly selected individuals, because they are fairly close to their respective theoretical minimum values. However, EAP was the least effective in this regard when compared with the other systems. 3 tables and 9 references (Author abstract modified)