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IL-4 stimulates RELMα and Ym1 expression by BMDCs. IL-4Rα expression by BMDCs (A) (shaded portion = isotype control; black line = media; gray line= +IL-4). WT or Il4ra−/− BMDCs were cultured overnight with or without IL-4 and were assessed for markers of alternative activation (B–F) (black = without IL-4; gray = 20 ng/mL IL-4). Data are representative of more than three experiments. Error bars indicate SEM of triplicate wells. a.u., Arbitrary units.
