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Confocal composite of NP uptake by HeLa (A) and H9 (B) cells. Cells were incubated with 1 and 2 mg Lissamine NPs, cells were fixed, DAPI (300 ng/ml) was added, and images were taken using an LSM 510 META NLO confocal microscope (Carol Zeiss, Inc., Thorwood, NT) (magnification 65×). Scale bar=100 μm (A) and 75 μm (B).
