This research is directed towards the fluorescent imaging and excited state lifetime measurement of single hexameric protein, r phycoerythrin (R-PE), by the newly developed near field optical system developed at the RLBL. The goal is to evaluate the aggregation state of single R-PE molecules and directly correlate it to energy transfer in protein subunits and monomeric forms. R-PE exhibits near unit fluorescence quantum yields and is photostable.
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