FIGURE 2. Time-activity curves for 1 subject for kidneys (A), heart (B), lungs (C), spleen (D), liver (E), and stomach (F) after injection of ¹¹C-L-deprenyl (H; •) and ¹¹C-L-deprenyl-D2 (D; ). Note that maximum value of ordinate for heart, lungs, spleen, liver, and stomach is only half that of kidneys (0.02%/mL vs. 0.04%/mL).

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