Bulgarian Jews in Israel: genetic blood markers. Red-cell antigens, serum proteins and red-cell isozymes.

Two hundred and sixteen unrelated Bulgarian Jews were typed for the following genetic systems: ABO, MNS, Rh, Kell and Duffy of the blood groups; ADA, AK1, ACP1, ESD, GLO, PGD, PGM1 and PGM2 of the red-cell enzymes, and for the serum proteins HP, GC and PI. A comparison of observed gene frequencies with those of two other Sephardi Jewish groups, from Libya and Morocco, disclosed significant heterogeneity in several systems. This was mostly due to Moroccan Jews differing from Bulgarian or from both the Libyan and Bulgarian Jews. A comparison of gene frequencies in Bulgarian Jews with those in Oriental Jews from Iraq and in Ashkenazi Jews from Poland disclosed a similarity between the three groups in Rh, ADA, GLO, PGM1 and HP. The frequencies for the above systems in the three groups were closer to those of Middle Easterners than to those of Europeans. A different pattern was observed for GC and PI, in which Bulgarian resembled Polish Jews and differed significantly from Iraqi Jews. This probably reflects an outcome of convergent adaptive processes.