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FIGURE 3. Uptake of iodonucleosides, expressed as organ-to-blood ratio of radioactivity. Animals were killed at 18 h after injection. Data are expressed as mean ± SD for 3 experiments. Iodonucleosides showed higher uptake in proliferation organs (femur, spleen, intestine, and thymus) than in nonproliferating organs (muscle, liver, and lung). Statistical significance between 125I-IUdR uptake and 125I-ITdU uptake was observed in intestine and thymus (P < 0.05; Student t test).
