METHODS AND COMPOSITIONS FOR INHIBITING CD32B EXPRESSING CELLS
The present invention relates to immunoglobulins that bind FcγRIIb+ cells and coengage the antigen on the cell's surface and an FcγRIIb on the cell's surface, methods for their generation, and methods for using the immunoglobulins.
1 . A nucleic acid encoding an Fc variant comprising at least amino acid modifications S267E and L328F as compared to a human Fc polypeptide, wherein numbering is according to the EU index according to Kabat.
2 . An expression vector comprising the nucleic acid of claim 1 .
3 . A host cell comprising the vector of claim 2 .
4 . A nucleic acid encoding a heavy chain an antibody, the heavy chain comprising an Fc variant comprising at least amino acid modifications S267E and L328F as compared to a human Fc polypeptide, wherein numbering is according to the EU index according to Kabat.
5 . An expression vector comprising the nucleic acid of claim 4 .
6 . A host cell comprising the vector of claim 5 .