B2M and teratoma: Luciferase-expressing B2M+/+ and B2M-/Etrimer ESC-derived teratomas and primed allogeneic CD8+ T cells were subcutaneously injected in immunodeficient NSG-B2M knockout mice. More growth was observed in B2M-/Etrimer teratoma as compared to B2M+/+ after CD8+ cell infusion.