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Cytokine transcript levels in the lungs of ADA/A1AR double-knockout mice. Levels of IL-4, IL-13, and IL-6 transcripts were determined in whole-lung extracts from postnatal day 14 mice using quantitative RT-PCR. Data are presented as mean pg of transcripts/μg RNA ± SEM; n = 8 for each. *P – 0.05 compared to ADA+ mice; **P – 0.05 compared to ADA–/–A1AR+/+ mice.
