CD74 (CD74 Antigen, DHLAG, Gamma Chain of Class II Antigens, HLA Class II Histocompatibility Antigen gamma Chain, HLA DR Antigens Associated Invariant Chain, HLA DR gamma, HLADG, I-a Antigen Associated Invariant Chain, I-a Associated Invariant Chain, I-a gamma, I-i, Invariant Polpypeptide of Major Histocompatibility Class II Antigen Associated, La Associated Invariant Chain, La gamma, Major Histocompatibility Complex Class II Invariant Chain, MHC HLA DR gamma Chain, p33, Protein 41) (FITC)