منابع مشابه
Excluded volume effects in gene stretching.
We investigate the effects excluded volume on the stretching of a single DNA in solution. We find that for small force F, the extension h is not linear in F but proportion to F(gamma), with gamma = (1 - nu)/nu, where nu is the well-known universal correlation length exponent. A freely joint chain model with the segment length chosen to reproduce the small extension behavior gives excellent fit ...
متن کاملExcluded-Volume Effects in Living Cells**
Biomolecules evolve and function in densely crowded and highly heterogeneous cellular environments. Such conditions are often mimicked in the test tube by the addition of artificial macromolecular crowding agents. Still, it is unclear if such cosolutes indeed reflect the physicochemical properties of the cellular environment as the in-cell crowding effect has not yet been quantified. We have de...
متن کاملExcluded volume effects on semiflexible ring polymers.
Two-dimensional semiflexible polymer rings are studied both by imaging circular DNA adsorbed on a mica surface and by Monte Carlo simulations of phantom polymers as well as of polymers with finite thickness. Comparison of size and shape of the different models over the full range of flexibilities shows that excluded volume caused by finite thickness induces an anisotropic increase of the main a...
متن کاملExcluded Volume Effects and Stretched Polymer Chains
The renormalized elasticity Jheory for jsolated flexible polymers developed recently by de Gennes is extended to the case of strong elongation ( Z / R F >> 1,Z is the average end-to-end length in response to a uniform tension and R F is the excluded volume Flory radius !fa free coil). I t is shown that, in this regime, the elastic restoring force f is nonlinear in the distortion and varies as Z...
متن کاملModeling the stretching of wormlike chains in the presence of excluded volume.
We propose an interpolation formula (the EV-WLC relation) for the force-extension behavior of wormlike chains in the presence of hard-core excluded volume interactions, analogous to the classic interpolation formula from Marko and Siggia for ideal wormlike chains. Using pruned-enriched Rosenbluth method (PERM) simulations of asymptotically long, discrete wormlike chains in an external force, we...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biopolymers
سال: 2002
ISSN: 0006-3525,1097-0282
DOI: 10.1002/bip.10122