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Title: DNA: a programmable force sensor. Author: Albrecht C, Blank K, Lalic-Mülthaler M, Hirler S, Mai T, Gilbert I, Schiffmann S, Bayer T, Clausen-Schaumann H, Gaub HE. Journal: Science; 2003 Jul 18; 301(5631):367-70. PubMed ID: 12869761. Abstract: Direct quantification of biomolecular interaction by single-molecule force spectroscopy has evolved into a powerful tool for materials and life sciences. We introduce an approach in which the unbinding forces required to break intermolecular bonds are measured in a differential format by comparison with a known reference bond (here, a short DNA duplex). In addition to a marked increase in sensitivity and force resolution, which enabled us to resolve single-base pair mismatches, this concept allows for highly specific parallel assays. This option was exploited to overcome cross-reactions of antibodies in a protein biochip application.[Abstract] [Full Text] [Related] [New Search]