FCRL4 (Fc Receptor-like Protein 4, FcR-like Protein 4, Fc Receptor Homolog 4, FcRH4, IFGP Family Protein 2, hIFGP2, Immune Receptor Translocation-associated Protein 1, FCRH4, IFGP2, IRTA1) (Carboxyfluorescein)