A new heavy chain disease protein (γHCD-JM) has been characterized by antigenic and structural criteria. The protein belongs to the IgG3-subclass and is closely related to Fc-fragment of G3-immunoglobulins. The predominant N-terminal amino acid of this protein is glutamic acid in the uncyclized form, and that of another γHCD is glycine.
Daniel Ein, Donald N. Buell, John L. Fahey
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