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A comparison of murine monoclonal IgG subclass antisera with rabbit polyclonal IgG subclass antisera restriction of the monoclonal antisera and further antigenic heterogeneity within the IgG subclasses of at least two antigenic variants of IgG1, two of IgG2, two of IgG3 and a third subtype of IgG4.
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V.‐A. Oxelius (1987) studied this question.
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