Isolated nucleic acid, vectors and host cells encoding antibody or immunoadhesin variants, as well as a process for producing the variants. The variants comprise a human IgG Fc region with amino acid substitution(s) therein, and display altered C1q binding function.

Ácido nucleic aislado, vectores y células huesped que codifican el anticuerpo o variantes del immunoadhesin, así como un proceso para producir las variantes. Las variantes abarcan una región humana de IgG Fc con el substitution(s) del aminoácido en esto, y exhiben la función obligatoria alterada de C1q.

 
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