raku pinnaretseptorite perekond (Fcγ ja Fcɛ retseptorid), mille liikmed seostuvad antikeha molekuli saba piirkonnaga (n.n. Fc-piirkond), An Fc receptor is a protein found on the surface of B lymphocytes, follicular dendritic cells, natural killer cells etc. that contribute to the protective functions of the immune system. Fc receptors bind to antibodies that are attached to infected cells or invading pathogens.