Modified FC molecules

A method of enhancing mediation of ADCP (antibody dependent cellular phagocytosis) comprising contacting a antibody with a macrophage expressing FcyRIIa, wherein said antibody comprises an Fc variant of a human parent Fc polypeptide, wherein said Fc variant comprises an amino acid substitution at position 236 in the Fc region as compared to the human parent Fc polypeptide, wherein said substitution is alanine, said Fc variant is an engineered glycoform with reduced fucose content as compared to the human parent Fc polypeptide, and said Fc variant exhibits an increase in affinity for FcγRIIa over FcγRIIb, thereby resulting in the binding of said Fc variant to FcyRIIa, wherein said increased affinity is relative to the affinity exhibited by the human parent Fc polypeptide and wherein the numbering is according to the EU index.