Abstract

Polymorphism of the seventh component of human complement (C7) was investigated in Japanese. Four common and one rare allotypes were observed with desialized samples. Besides three common alleles,C7*1, C7*2 andC7*4, the existence of the hypomorphic variant,C7*3, was confirmed in Japanese with a polymorphic frequency. The recently describedC7*5 was found to correspond toC7*3 by comparing with reference samples. Moreover, a rare variant, tentatively named C7 7, was considered to be new. The population samples were also typed for C6. A rare variant, designated M92, was newly found. No significant associations between C6 and C7 alleles were found.

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