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A PbS quantum dot encapsulated into the hollow core of an apoferritin protein (see image) offers several advantages over existing composites based on quantum dots including a lower level of cytotoxicity, differential toxicity between healthy and cancerous cells, emission tunable in the near-infrared wavelength range of interest for bioimaging, water solubility and stability, and the same mobility as that of apoferritin.
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Turyanska et al. (2009) studied this question.
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