Mechanism of Homology Recognition in DNA Recombination from Dual-Molecule Experiments

In E. coli homologous recombination, a filament of RecA protein formed on DNA searches and pairs a homologous sequence within a second DNA molecule with remarkable speed and fidelity. Here, we directly probe the strength of the two-molecule interactions involved in homology search and recognition using dual-molecule manipulation, combining...

Method for determining one or more characterizing features of a macromolecule and an apparatus for carrying out said method

The invention concerns a method and apparatus for determining one or more characterizing features of a macromolecule, in particular torque and/or twist of nucleic acids like DNA, using magnetic fields.

Note: Interference technique for minimally invasive, subnanometer, microsecond measurements of displacements

We present a novel high-resolution technique for single-molecule experiments, viz., differential traveling wave tracking. This is an interference-based scattering technique where we use gold nanoparticles for high scattering intensities and incorporate differential measurements along one in-plane direction to subtract mechanical noise and drift...