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. 2012 Jun 27;7(6):e38350. doi: 10.1371/journal.pone.0038350

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Ren et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Red fluorescence (7F5@Au/Fe3O4rpar; observed in the membrane of the 7F5@Au/Fe3O4+ PC-3 cells (top row) while no red fluorescence was observed in the membrane of the 7F5@Au/Fe3O4+ SMMC-7721 cells (bottom row). Cell nuclei were stained blue in color via DAPI (middle column). 7F5@Au/Fe3O4 fluorescence images and DAPI images are merged in right-most column. Scale bar, 10 µm.