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The relationship between DNA synthesis and nuclear uptake. Nuclei from scrape‐ruptured quiescent cells were incubated for 3 h in either (A) low speed supernatants (LSS) or (B) high speed supernatants (HSS) of Xenopus egg extracts containing APC‐NLS and Fl‐dUTP. Levels of APC and Fl‐dUTP fluorescence for the same individual nuclei were then quantified by confocal microscopy and the results presented as scatter plots. Each point represents an individual nucleus.
