The preliminary report on the C4 gene duplication in chinese

The C4 gene duplication has been studied among 78 families with 366 members in Chinese. This study allowed the detection of 7 groups of C4 gene duplication or triplication in the family material rlpresenting an overall frequency of 9.0%.The total members with duplicated of tripli- cated C4 genes were 17,which representsa frequency of 6.4%.The duplicated C4 gnes all be- long to the C4B genes.The kinds of C4B gene duplication and the number each are:①)C4B(1, 2)×2,②B(1,12)×6,③B(1,1)×5,④B(1,96,96)×2 and ⑤B(2,2)×2.