; mast cells
FcγRIIa  Low  IgG1, IgG3, but IgG2 binding limited to the FcγRIIa‐H131 form, ~70% people)  All leukocytes and platelets except T and B lymphocytes
FcγRIIc a  Low  IgG1, IgG3, IgG4  NK cells
FcγRIIIa  Low  Ig