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Figure 2: Western blot analysis of IL-15Rα in synovial fluids from RA patients. Proteins from synovial fluids from different patients (lanes 1–5) were separated on 12.5% SDS-PAGE and transfer to nitrocellulose for western blotting. The western blot was probed with anti-IL-15Rα antibody and development with anti-goat-HRP. Representative western blot is shown.