FCGR3A (Fc Fragment Of IgG Receptor IIIa): FCGR3A, also known as CD16a, is a receptor for the Fc portion of immunoglobulin G (IgG) and plays a key role in immune response by mediating antibody-dependent cellular cytotoxicity (ADCC). It is expressed on natural killer (NK) cells, macrophages, and some T cells, facilitating the clearance of pathogens and antibody-coated cells. Variations in FCGR3A have been associated with susceptibility to autoimmune diseases and response to immunotherapy in cancer treatment....