DNA Stretching Kinetics and Entropic Bottlenecks

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Stretching of proteins in the entropic limit.

Mechanical stretching of six proteins is studied through molecular dynamics simulations. The model is Go-like, with Lennard-Jones interactions at native contacts. Low-temperature unfolding scenarios are remarkably complex and sensitive to small structural changes. Thermal fluctuations reduce the peak forces and the number of metastable states during unfolding. The unfolding pathways also simpli...

متن کامل

Entropic transport: kinetics, scaling, and control mechanisms.

We show that transport in the presence of entropic barriers exhibits peculiar characteristics which makes it distinctly different from that occurring through energy barriers. The constrained dynamics yields a scaling regime for the particle current and the diffusion coefficient in terms of the ratio between the work done to the particles and available thermal energy. This interesting property, ...

متن کامل

Pushing and Stretching DNA

DNA molecules can be used as a model system for studying polymer physics. By manipulating and watching individual DNA molecules we can test theories that describe the conformation and dynamics of polymers that the community has been investigating for decades (like the so-called coil-stretch transition). These properties are significantly changed depending on the degree of confinement of the pol...

متن کامل

Stretching an anisotropic DNA.

We present a perturbation theory to find the response of an anisotropic DNA to the external tension. It is shown that the anisotropy has a nonzero but small contribution to the force-extension curve of the DNA. Thus an anisotropic DNA behaves like an isotropic one with an effective bending constant equal to the harmonic average of its soft and hard bending constants.

متن کامل

ذخیره 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: Biophysical Journal

سال: 2010

ISSN: 0006-3495

DOI: 10.1016/j.bpj.2009.12.4120