A New Genetic Marker of Human ImmunoglobulinsDetermined by an Allele at the α2 Locus

Abstract

A new antigenic determinant occurring on human IgA2 protein is described. In family studies this marker showed to be dominant, non-sex-linked and antithetical to the first known marker of α2 chains. It is proposed to call this marker A(2)m(2), indicating that it is the second marker of IgA2 proteins.