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Science 26 July 1963:
Vol. 141. no. 3578, pp. 355 - 356
DOI: 10.1126/science.141.3578.355
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Articles

Electron Microscope Autoradiography of Bacteria Labeled with Iodine-125

Nobuko O. Kuhn 1 and Carl G. Harford 1

1 Department of Medicine, Washington University School of Medicine, St. Louis 10, Missouri

The low-energy extranuclear electrons emitted by iodine-125 can be used for electron microscope autoradiography with results comparable to those obtained with tritium. Autoradiographs of tritium-labeled bacteria showed that 71 percent of all reacted grains localized on the cell. This figure was 86 percent when I125-labeled bacteria were used.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)