| Literature DB >> 10359775 |
G Peleg1, A Lewis, M Linial, L M Loew.
Abstract
Membrane potential around single molecules has been measured by using the nonlinear optical phenomenon of second harmonic generation. This advance results from the interaction between a highly dipolar molecule with a selectively directed highly polarizable 1-nm gold particle. With this approach, a second harmonic signal, which is enhanced by the nanoparticle, is detected from a volume of nanometric dimensions. This present work clearly shows that functional cellular imaging around single molecules is possible by selectively directing an antibody with a 1-nm gold label to a specific membrane protein. The results of this work open the way for three-dimensional, high resolution functional imaging of membrane electrophysiology in cells and cellular networks.Mesh:
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Year: 1999 PMID: 10359775 PMCID: PMC21978 DOI: 10.1073/pnas.96.12.6700
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205