HLA class II histocompatibility antigen gamma chain also known as HLA-DR antigens-associated invariant chain or<unk>  (Cluster of Differentiation 74), is a protein that in humans is encoded by the<unk>  gene. The invariant chain (Abbreviated Ii) is a polypeptide which plays a critical role in antigen presentation. It is involved in the formation and transport of MHC class II peptide complexes for the generation of CD4+ T cell responses. The cell surface form of the invariant chain is known as<unk> .<unk>  is a cell surface receptor for the cytokine macrophage migration inhibitory factor (MIF).
CD74
CD22
CD23
CD80
CD86
CD44
CDV3 
CD8