Organ distribution and autoradiography after administration of 125I-16 alpha-iodo-estradiol in female rats.

Tissue distribution experiments with 125I-1 16 alpha-iodo-estradiol (Amersham) showed the highest tissue-to-blood ratio of 3 to 8 in the liver, uterus, mammary gland, ovaries and adrenals up to 2 h after the injection. Satisfactory images with a simple autoradiographical techniques according to Stumpf [1971] have been achieved at 2 h after the injection of drug.