Inhibition  Reduce B‐cell proliferation or innate cell activation by antibody complexes  Inhibition of ITAM cell activation (i.e. BCR) or activating‐type FcR (i.e. FcγR, FcεRI, FcαRI). Note that the FcγRIIb must be co‐cross‐linked with the ITAM activating receptor.  FcγRIIb