Table 4. Biodistribution of ¹³¹I-4b in Normal Mice^a.

	injected dose/gram tissue at different time intervals, %
organs and body fluids	1/2 h	1 h	2 h	4 h
blood	7.1 ± 0.5b	6.9 ± 0.3b	4.4 ± 0.3b	1.8 ± 0.3b
bone	1.1 ± 0.03b	1.2 ± 0.02b	0.8 ± 0.7b	0.8 ± 0.02b
liver	5.4 ± 0.5b	6.9 ± 0.4b	8.4 ± 0.7	2.7 ± 0.02
stomach	12.3 ± 1.2	16.0 ± 1.6b	14.1 ± 1.2b	10.2 ± 0.9b
intestine	5.1 ± 0.3b	4.4 ± 0.3b	3.1 ± 0.3b	2.9 ± 0.2b
lung	3.9 ± 0.3b	6.4 ± 0.6b	4.6 ± 0.5b	3.2 ± 0.2b
heart	5.2 ± 0.3b	5.0 ± 0.4b	3.6 ± 0.3b	1.7 ± 0.01b
spleen	3.1 ± 0.2b	2.7 ± 0.2	2.3 ± 0.2b	1.1 ± 0.02
kidney	3.9 ± 0.4b	6.2 ± 0.5b	5.8 ± 0.6b	4.5 ± 0.3b
urine	5.1 ± 0.6b	7.5 ± 0.5b	14.3 ± 1.2b	18.1 ± 1.3b
brain	0.4 ± 0.06b	0.5 ± 0.03b	0.6 ± 0.06b	0.7 ± 0.03b
thyroid	2.7 ± 0.2b	4.8 ± 0.4	7.6 ± 0.6b	9.4 ± 1.2
normal muscle	1.4 ±0.07b	1.6 ± 0.08	1.5 ± 0.05b	1.9 ± 0.08

^aValues expressed as mean ± SEM, n = 3.

^bSignificantly different from each previous value of each organ using unpaired Student’s t-test (P ≤ 0.05).