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Molecular photovoltaics and the photoactivation of mammalian cells

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5 Author(s)
Kuritz, T. ; Chem. Sci. Div., Oak Ridge Nat. Lab., TN, USA ; Lee, I. ; Owens, E.T. ; Humayun, M.
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Photosynthetic reaction centers are integral plant membrane protein complexes and molecular photovoltaic structures. We report here that addition of Photosystem I (PSI)-proteoliposomes to retinoblastoma cells imparts photosensitivity to these mammalian cells, as demonstrated by light-induced movement of calcium ions. Control experiments with liposomes lacking PSI demonstrated no photosensitivity. The data demonstrate that PSI, a nanoscale molecular photovoltaic structure extracted from plants, can impart a photoresponse to mammalian cells in vitro.

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NanoBioscience, IEEE Transactions on  (Volume:4 ,  Issue: 2 )