Abstract: Red cell isoenzymes GPT, 6-PGD, ACP, ADA, AK1 and the serum group GC-Tf are genetic polymorphisms that are inherited according to the Mendelian law of segregation. In this paper, the phenotype frequencies of the GPT, 6-PGD, ACP, ADA, AK1 and GC-Tf have been investigated by the method of typing GPT-ACP-6PGD-ADA-AK1 and Gc-Tf on the same mixed starch agarose gel electrophoresis among seven Chinese nationalities, Ewenki, Oroqen and Dawuor.
The distribution of their type frequencies varied with ethnic group and the gene frequencies, DP and CDP were also calculated. The ranges of gene frequencies of Ewenki, Oroqen and Dawuor were: GPT^1 0.46875 - 0.47225, 6-PGD^A 0.8563 - 0.8583, ACP^A 0.2139 - 0.2208, ADA^1 0.9500 - 0.9596, AK^1_1 0.9963- 1.000, Gc^1 0.64375- 0.65445, Tf^c 0.9669- 0.96945. The DP were: GPT 0.6288- 0.6303, 6-PGD 0.3999- 0.4037, Acp 0.4916- 0.5187, ADA 0.1487- 0.1800, AK_1 0- 0.0111, GC 0.5839- 0.6029, Tf 0.1147- 0.1236. No rare genes of other isoenzymes or serum groups were found.
The differences in the distribution of 5 isoenzymes and 2 serum groups in the 3 ethnic groups were analyzed. It was found that there were many similarities in the genetic characters of the Oroqen, Ewenki and Dawuor herdsmen populations addressed in the past
suoluner, showing the possible common blood ties of these 3 populations, which has been recorded in the historical data.

Key words: Isoenzymes and serum group; Gene polymorphism; Ethnic group