#$%^&*AU2011253771B220131031.pdf#####ABSTRACT Polypeptides and other compounds that can bind specifically to the CH2 -CH 3 cleft of an immunoglobulin molecule, and methods for using such polypeptides and 5 compounds to inhibit Fc-mediated immune complex formation, as described. 01/12/1 Iva 19653 abstract.2WO 2005/086947 PCT/US2005/008131 1/14 CLL 00 066 0~06 0)G a 1..5 Z SUBSTITUTE SHEET (RULE 26)