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The inset line graph shows a significant linear relationship between brain/serum ratios and exposure time for ovine 131I-IL-1β. Each point represents 1 subject. Histogram shows that inclusion of 3 μg/mouse but not 1 μg/mouse of unlabeled ovine IL-1β significantly reduced the transport of ovine 131I-IL-1β across the BBB. Error bars are SEM. ∗ p < 0.05.
