- SHORT COMMUNICATION - Phenotype and gene frequencies of some blood groups and protein systems in Bulgarians from the Smolyan region (South-Central Bulgaria) SOFIA D. BALTOVA Department of Human Anatomy and Physiology, Faculty of Biology, University of Plovdiv “Paisij Hilendarski”, 4000 Plovdiv, Bulgaria Abstract Studies on haemogenetic polymorphisms in Bulgarians are relatively scarce and mostly restricted to the Sofia region. As a contribution to the haemogenetic characteristics of Bulgarians, the results of an examination of ABO, Rh, MNSs, P1, HPA, GM1, PGM1, ACP and ESD in 540 individuals from the Smolyan region of south-central Bulgaria are reported. The typing was done by standard techniques. During all surveys, only the classic types of blood group systems were found. The combined data are compared with other populations.   < back .