Issue Date: June 22, 2009
Fluorescent Tag Takes The Wheel
Scientists usually consider fluorescent labels on biomolecule delivery vehicles to be passengers along for the ride. But in some cases, those labels might actually be in the driver's seat. Caltech's Jacqueline K. Barton and Cindy A. Puckett have found that a ruthenium complex conjugated to the cell-penetrating peptide octaarginine displays different cellular uptake behavior when it is tagged with fluorescein (J. Am. Chem. Soc., DOI: . . .
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