منابع مشابه
Conformations of confined biopolymers.
Nanoscale and microscale confinement of biopolymers naturally occurs in cells and has been recently achieved in artificial structures designed for nanotechnological applications. Here, we present an extensive theoretical investigation of the conformations and shape of a biopolymer with varying stiffness confined to a narrow channel. Combining scaling arguments, analytical calculations, and Mont...
متن کاملStudies in Confined Biopolymers
In this work we analyze the theoretical aspects of a single polymer confined inside a cavity. The problem is of biological relevance since it is known, for instance, that molecules like proteins need an isolated environment in order to quickly and correctly reach their folded native state. The polymer is considered in the Grand Canonical ensemble of its monomeric units, where its average length...
متن کاملEffect of disorder on the contact probability of elongated conformations of biopolymers.
Biopolymers are characterized by heterogeneous interactions, and usually perform their biological tasks forming contacts within domains of limited size. Combining polymer theory with a replica approach, we study the scaling properties of the probability of contact formation in random heteropolymers as a function of their linear distance. It is found that, close to or above the θ point, it is po...
متن کاملConformations of biopolymers in the gas phase: a new mass spectrometric method
A method is developed for measuring collision cross sections of gas-phase biomolecules using a slightly modified commercial triple quadrupele instrument. The modifications allow accurate stopping potentials to be measured for ions exiting the collision region of the instrument. A simple model allows these curves to be converted to cross sections. In order to account for certain poorly defined e...
متن کاملInteraction of Cartilage Biopolymers
Section on Tissue Biophysics and Biomimetics, NICHD, National Institutes of Health, 13 South Drive, Bethesda, MD 20892, USA E-mail: [email protected] Summary: Aggrecan is a charged biopolymer whose complexes with hyaluronic acid provide the compressive resistance of cartilage. In cartilage extracellular matrix aggrecan-hyaluronic acid complexes are enmeshed within a network of collagen fibr...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 2007
ISSN: 1539-3755,1550-2376
DOI: 10.1103/physreve.75.050902