P2RY2 and uveitis: In order to investigate the mechanisms responsible for the decreased susceptibility of P2Y2-/- mice or TL to develop or induce uveitis, respectively, we have first analyzed comparatively, 12 days after immunization with IRBP 1–20 peptide in CFA and Mycobacterium plus PTX, the spleen and draining lymph nodes of P2Y2-/- and P2Y2+/+ IRBP-immunized mice for cell composition.