NR4A2 and autoimmune disease: NP‐KLH immunization of mice on a C57BL/6 background, which do not develop spontaneous autoimmune disease, led to similar levels of Th cells (red) entering splenic B cell follicles (green, Fig 3D; Appendix Fig S1A) with/without Nr4a2 in T cells and similar formation of germinal centers within lymphoid follicle structures (Green, Fig 3E; Appendix Fig S1B).