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.
No takes yet. Share an insight, caveat, or question.
Stafford et al. (1964) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: