Radioautographic Evidence for the Incorporation of Leucine-Carbon-14 into the Mitotic Apparatus

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Science  07 Feb 1964:
Vol. 143, Issue 3606, pp. 580-581
DOI: 10.1126/science.143.3606.580


Mitotic apparatus isolated at metaphase from sea urchin eggs, and placed in sea water containing leucine-carbon-14 after fertilization, has been shown by radioautographs to have taken up carbon-14 in such a way that it is not removable by repeated washing, by "chasing" with leucine-carbon-12, or by treatment with hot trichloroacetic acid.