Protein A or G inhibitor

[Srinivasan, Mohan]

I am looking for commercially available ligands that could bind to
Protein A or G
and inhibit the binding of Immunoglobulins.  Ideally, I'd like it to be
the Fc portion
of Human_IgG (any isotype).  Is anyone aware of such a ligand?

Thanks!
(msrinivasan at medarex.com)

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