منابع مشابه
Stability of monomer-dimer piles.
We present an experimental and theoretical study of piles consisting of monodisperse spherical grains mixed with a weight fraction nu(d) of dimer grains made by the rigid bonding of two such spherical grains. The maximum static angle of stability tantheta(c) of the pile increases from 0.45 to 1.1 and the grain packing fraction Phi decreases from 0.58 to 0.52 as nu(d) is increased from 0 to 1. T...
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Although streptavidin's high affinity for biotin has made it a widely used and studied binding protein and labeling tool, its tetrameric structure may interfere with some assays. A streptavidin mutant with a simpler quaternary structure would demonstrate a molecular-level understanding of its structural organization and lead to the development of a novel molecular reagent. However, modulating t...
متن کاملMonomer-dimer tatami tilings of square regions
We prove that the number of monomer-dimer tilings of an n × n square grid, with m < n monomers in which no four tiles meet at any point is m2 + (m + 1)2, when m and n have the same parity. In addition, we present a new proof of the result that there are n2 such tilings with n monomers, which divides the tilings into n classes of size 2. The sum of these tilings over all monomer counts has the c...
متن کاملMonomer-Dimer Tatami Tilings of Rectangular Regions
In this paper we consider tilings of rectangular regions with two types of tiles, 1× 2 tiles (dimers) and 1× 1 tiles (monomers). The tiles must cover the region and satisfy the constraint that no four corners of the tiles meet; such tilings are called tatami tilings. We provide a structural characterization and use it to prove that the tiling is completely determined by the tiles that are on it...
متن کاملDimer-monomer dissociation of human hemoglobin A.
Isolated 3H-labeled human hemoglobin alpha chains were incubated with unlabeled carbonmonoxyhemoglobin A for 72 h in 0.01 M potassium phosphate, pH 7.0, at 25 degrees C. Following separation of the free alpha chain monomers and Hb A (alpha 2 beta 2) tetramers by electrophoresis on cellulose acetate strips or by chromatography on DEAE-cellulose columns, analysis of radioactivity showed a slow tr...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 2002
ISSN: 1063-651X,1095-3787
DOI: 10.1103/physreve.66.051307