38 research outputs found
Hairpins in the conformations of a confined polymer
Get PDFIf a semiflexible polymer confined to a narrow channel bends around by 180
degrees, the polymer is said to exhibit a hairpin. The equilibrium extension
statistics of the confined polymer are well understood when hairpins are
vanishingly rare or when they are plentiful. Here we analyze the extension
statistics in the intermediate situation via experiments with DNA coated by the
protein RecA, which enhances the stiffness of the DNA molecule by approximately
one order of magnitude. We find that the extension distribution is highly
non-Gaussian, in good agreement with Monte Carlo simulations of confined
discrete wormlike chains. We develop a simple model that qualitatively explains
the form of the extension distribution. The model shows that the tail of the
distribution at short extensions is determined by conformations with one
hairpin.Comment: Revised version. 22 pages, 7 figures, 2 tables, supplementary
materia
Integrative taxonomy of the Plain-backed Thrush (Zoothera mollissima) complex (Aves, Turdidae) reveals cryptic species, including a new species
Full text linkBirds of Tikal, Guatemala, by Frank B. Smithe and Raymond A. Paynter, Jr
No full textVolume: 128Start Page: 245End Page: 32
On the Theory of the Electromagnetic Wave Propagation Through Inhomogeneous Dispersive Media
No full textOccurrence of hybrids between Momotus momota and Baryphthengus ruficapillus (Momotidae) in central Brazil
No full textThe unique type specimen of the bird of paradiseLophorina superba pseudoparotia Stresemann 1934 (Paradisaeidae): a hybrid ofLophorina superba xParotia carolae
No full text
Nonthermal Particle and Full-Wave Diffraction Effects on Heating and Current Drive in the ICRF and LHRF Regimes
No full textA New Species of the Geophis sieboldi Group (Squamata: Colubridae) Exhibiting Color Pattern Polymorphism from Guerrero, Mexico
No full text
