Polymorphism of haptoglobin, transferrin and third component of complement in subpopulations of Han ethnic group.

The genetic polymorphisms of haptoglobin, transferrin and third component of complement were investigated by electrophoretic techniques in six subgroups (Harbin, Xi'an, Chengdu, Guiyang, Zhangzhou and Lanzhou) of the Han ethnic group in China. For haptoglobin, HP*1 frequency shows a descending tendency from the South to the North in the Han ethnic group. Among the transferrin alleles, Dchi shows an increasing frequency from the North to the South. For the third component of complement, S allele is absolutely preponderant.