FcRH6 /FCRL6 hFc Chimera, Human

A surprising number of Fc receptor (FcR) relatives have been recognized recently with the potential capacity to modulate innate and adaptive immune responses. The six human FcR homologs (FcRH1-6), which belong to a phylogenetically conserved gene family, have variable numbers of extracellular immunoglobulin domains of five different subtypes. All but one of these new receptors, FcRH6, are expressed on B cells at different stages in differentiation.