Electro-optical property of extremely stretched skinned muscle fibers.

abstract：:The effects of the Ca(2+)-induced Ca2+ release blocker procaine on individual sarcoplasmic reticulum Ca2+ release channels have been examined in planar lipid bilayers. Procaine did not reduce the single channel conductance nor appreciably shorten the mean open times of the channel; rather, it increased the longest clo...

journal_title：Biophysical journal

authors： Zahradníková A,Palade P

更新日期：1993-04-01 00:00:00

abstract：:In cardiac muscle, troponin (Tn) and tropomyosin inhibit actin and myosin interactions through the steric blocking of myosin binding to F-actin. Ca2+ binding to Tn C modulates this inhibition. Thin filaments become activated upon Ca2+ binding, which enables strong binding of myosin with a concomitant release of ATP hy...

journal_title：Biophysical journal

authors： Solís C,Kim GH,Moutsoglou ME,Robinson JM

更新日期：2018-11-06 00:00:00

abstract：:The aggregation of amyloid-β (Aβ) peptides plays a crucial role in the etiology of Alzheimer's disease (AD). Recently, it has been reported that an A2T mutation in Aβ can protect against AD. Interestingly, a nonpolar A2V mutation also has been found to offer protection against AD in the heterozygous state, although it...

journal_title：Biophysical journal

authors： Das P,Murray B,Belfort G

更新日期：2015-02-03 00:00:00

abstract：:The absence of comprehensive measured kinetic values and the observed inconsistency in the available in vitro kinetic data has hindered the formulation of network-scale kinetic models of biochemical reaction networks. To meet this challenge we present an approach to construct a convex space, termed the k-cone, which c...

journal_title：Biophysical journal

authors： Famili I,Mahadevan R,Palsson BO

更新日期：2005-03-01 00:00:00

abstract：:The general formalism required to treat two-state sliding filament models of muscle contraction, including free energy considerations, is first reviewed and amplified. This formalism is then used to examine, and modify as needed, three models studied previously by Podolsky and Nolan, in which cross-bridge attachment-d...

journal_title：Biophysical journal

authors： Hill TL,Eisenberg E,Chen YD,Podolsky RJ

更新日期：1975-04-01 00:00:00

abstract：:Ca(2+) ion effect on protoplasmic streaming in an internodal cell of Nitella has been investigated for various temperatures. We have found that the protoplasmic streaming at low temperature is remarkably affected by the Ca(2+) ions in the internodal cell but larger concentrations of the Ca(2+) ions are needed to suppr...

journal_title：Biophysical journal

authors： Takamatsu A,Aoki T,Tsuchiya Y

更新日期：1993-01-01 00:00:00

abstract：:Protein-mediated membrane remodeling is a ubiquitous and critical process for proper cellular function. Inverse Bin/Amphiphysin/Rvs (I-BAR) domains drive local membrane deformation as a precursor to large-scale membrane remodeling. We employ a multiscale approach to provide the molecular mechanism of unusual I-BAR dom...

journal_title：Biophysical journal

authors： Jarin Z,Tsai FC,Davtyan A,Pak AJ,Bassereau P,Voth GA

更新日期：2019-08-06 00:00:00

abstract：:To elucidate effects of electrostatic interactions resulting from surface charges on structures and phase stability of cubic phases of lipid membranes, membranes of 1-monoolein (MO) and dioleoylphosphatidic acid (DOPA) (DOPA/MO membrane) mixtures have been investigated by small-angle x-ray scattering method. As increa...

journal_title：Biophysical journal

authors： Li SJ,Yamashita Y,Yamazaki M

更新日期：2001-08-01 00:00:00

abstract：:In this paper, femtosecond pump-probe spectroscopy in the visible region of the spectrum has been used to examine the ultrafast dynamics of the retinal excited state in both the native trimeric state and the monomeric state of bacteriorhodopsin (bR). It is found that the excited state lifetime (probed at 490 nm) incre...

journal_title：Biophysical journal

authors： Wang J,Link S,Heyes CD,El-Sayed MA

更新日期：2002-09-01 00:00:00

abstract：:The oligomeric state and function of band 3, purified by sulfhydryl affinity chromatography in reduced Triton X-100, was investigated. Size exclusion high-performance liquid chromatography showed that a homogeneous population of band 3 dimers could be purified from whole erythrocyte membranes. The elution profile of b...

journal_title：Biophysical journal

authors： Taylor AM,Boulter J,Harding SE,Cölfen H,Watts A

更新日期：1999-04-01 00:00:00

abstract：:We introduce here a novel Monte Carlo simulation method for studying the interactions of hydrophobic peptides with lipid membranes. Each of the peptide's amino acids is represented as two interaction sites: one corresponding to the backbone alpha-carbon and the other to the side chain, with the membrane represented as...

journal_title：Biophysical journal

authors： Kessel A,Shental-Bechor D,Haliloglu T,Ben-Tal N

更新日期：2003-12-01 00:00:00

abstract：:The coat protein of tobacco mosaic virus is known to form three different classes of aggregate, depending on environmental conditions, namely helical, disk, and A-protein. Among the disk aggregates, there are four-layer, six-layer, and long stacks, which can be obtained by varying the ionic strength and temperature co...

journal_title：Biophysical journal

authors： Díaz-Avalos R,Caspar DL

更新日期：1998-01-01 00:00:00

abstract：:Are protein nonpolar cavities filled with water molecules? Although many experimental and theoretical investigations have been done, particularly for the nonpolar cavity of IL-1 beta, the results are still conflicting. To study this problem from the thermodynamic point of view, we calculated hydration free energies of...

journal_title：Biophysical journal

authors： Oikawa M,Yonetani Y

更新日期：2010-06-16 00:00:00

abstract：:Influenza A virus M2 protein is known to form acid-activated, proton-selective, amantadine-sensitive channels. We directly measured proton uptake in vesicles containing reconstituted M2 by monitoring external pH after addition of valinomycin to vesicles with 100-fold-diluted external [K(+)]. External pH typically incr...

journal_title：Biophysical journal

authors： Moffat JC,Vijayvergiya V,Gao PF,Cross TA,Woodbury DJ,Busath DD

更新日期：2008-01-15 00:00:00

abstract：:It is widely assumed that the decay of fluorescence in photosynthetic systems can be described as a sum of exponential components and that the amplitude of each component is directly related to the absorption cross-section of the antenna pigments coupled to the fluorescing species. We present exact calculations of exc...

journal_title：Biophysical journal

authors： Jean JM,Chan CK,Fleming GR,Owens TG

更新日期：1989-12-01 00:00:00

abstract：:A promising strategy to control the aggregation of the Alzheimer's Aβ peptide in the brain is the clearance of Aβ from the central nervous system into the peripheral blood plasma. Among plasma proteins, human serum albumin plays a critical role in the Aβ clearance to the peripheral sink by binding to Aβ oligomers and ...

journal_title：Biophysical journal

authors： Milojevic J,Melacini G

更新日期：2011-01-05 00:00:00

abstract：:This paper describes the relation between the quantum yield of photosynthesis in the red alga Porphyridium cruentum, and the spectral composition of light, changed by filtering white light through aqueous phycobilin solutions of increasing optical density. At sufficiently high densities of the filter solution, no meas...

journal_title：Biophysical journal

authors： THOMAS JB,GOVINDJEE

更新日期：1960-09-01 00:00:00

abstract：:To investigate the properties of a pure liquid ordered (Lo) phase in a model membrane system, a series of saturated phosphatidylcholines combined with cholesterol were examined by variable temperature multinuclear (1H, 2H, 13C, 31P) solid-state NMR spectroscopy and x-ray scattering. Compositions with cholesterol conce...

journal_title：Biophysical journal

authors： Clarke JA,Heron AJ,Seddon JM,Law RV

更新日期：2006-04-01 00:00:00

abstract：:Investigation of the molecular mechanisms underlying amyloid-related human diseases attracts close attention. These diseases, the number of which currently is above 40, are characterized by formation of peptide or protein aggregates containing a cross-β structure. Most of the amyloidogenesis mechanisms described so fa...

journal_title：Biophysical journal

authors： Katina NS,Balobanov VA,Ilyina NB,Vasiliev VD,Marchenkov VV,Glukhov AS,Nikulin AD,Bychkova VE

更新日期：2017-09-05 00:00:00

abstract：:Ca2+ release from the endoplasmic reticulum (ER) contributes to Ca2+ transients in frog sympathetic ganglion neurons. Here we use video-rate confocal fluo-4 fluorescence imaging to show that single action potentials reproducibly trigger rapidly rising Ca2+ transients at 1-3 local hot spots within the peripheral ER-ric...

journal_title：Biophysical journal

authors： Cseresnyés Z,Schneider MF

更新日期：2004-01-01 00:00:00

abstract：:Skeletal and heart muscle excitability is based upon the pool of available sodium channels as determined by both fast and slow inactivation. Slow inactivation in hH1 sodium channels significantly differs from slow inactivation in hSkM1. The beta(1)-subunit modulates fast inactivation in human skeletal sodium channels ...

journal_title：Biophysical journal

authors： Vilin YY,Makita N,George AL Jr,Ruben PC

更新日期：1999-09-01 00:00:00

abstract：:We present a method for calculating the configurational-dependent diffusion coefficient of a globular protein as a function of the global folding process. Using a coarse-grained structure-based model, we determined the diffusion coefficient, in reaction coordinate space, as a function of the fraction of native contact...

journal_title：Biophysical journal

authors： Oliveira RJ,Whitford PC,Chahine J,Wang J,Onuchic JN,Leite VB

更新日期：2010-07-21 00:00:00

abstract：:Neurons communicate by releasing neurotransmitters that are stored in intracellular vesicular compartments. PC12 cells are frequently used as a model secretory cell line that is described to have two subpools of vesicles: small clear vesicles and dense core vesicles. We measured transmitter molecules released from ves...

journal_title：Biophysical journal

authors： Adams RD,Harkins AB

更新日期：2014-12-16 00:00:00

abstract：:Pacemaker depolarization in interstitial cells of Cajal (ICCs) is believed to be induced by Ca2+ transients and activation of anoctamin-1 (Ano1) channels in the plasma membrane. However, block of store-operated calcium entry (SOCE) or the Na-K-2Cl cotransporter (NKCC1) terminates pacemaker activity in ICC, indicating ...

journal_title：Biophysical journal

authors： Youm JB,Zheng H,Koh SD,Sanders KM

更新日期：2019-08-20 00:00:00

abstract：:In this paper, we consider the effect of adding small carbohydrate solutes (small sugars) to DMPC (1,2-dimyristoyl-sn-glycero-3-phosphocholine) L(alpha) dispersions and the consequences on the force balance at zero osmotic pressure (maximal swelling). We show the importance of long incubations required to obtain sampl...

journal_title：Biophysical journal

authors： Demé B,Dubois M,Zemb T

更新日期：2002-01-01 00:00:00

abstract：:Ceramides have been implicated in the initiation of apoptosis by permeabilizing the mitochondrial outer membrane to small proteins, including cytochrome c. In addition, ceramides were shown to form large metastable channels in planar membranes and liposomes, indicating that these lipids permeabilize membranes directly...

journal_title：Biophysical journal

authors： Anishkin A,Sukharev S,Colombini M

更新日期：2006-04-01 00:00:00

abstract：:Recently, several studies have shown that short doubled-stranded DNA (dsDNA) loops more readily than the wormlike chain model predicts. In most of these experiments, the intrinsic bendedness of dsDNA, which in theory can dramatically influence looping dynamics, was either avoided or unaccounted for. To investigate the...

journal_title：Biophysical journal

authors： Le TT,Kim HD

更新日期：2013-05-07 00:00:00

abstract：:Intracellular Ca2+ was determined with the fura-2 technique during electrically induced contractions in the rabbit rectococcygeus smooth muscle at 22 degreesC. The muscles were electrically activated to give short, reproducible contractions. Intracellular [Ca2+] increased during activation; the increase in [Ca2+] prec...

journal_title：Biophysical journal

authors： Arner A,Malmqvist U,Rigler R

更新日期：1998-10-01 00:00:00

abstract：:Several strategies directed toward increasing the participation of minority students in physics and biophysics are presented. Since the number of minority students entering college with an interest in science and mathematics must be increased if we expect to see more students graduating in science, several programs ai...

journal_title：Biophysical journal

authors： Tanaka JC,Gladney LD

更新日期：1993-07-01 00:00:00

abstract：:Control of organelle abundance is a fundamental unsolved problem in cell biology. Mechanisms for number control have been proposed in which organelle assembly is actively increased or decreased to compensate for deviations from a set-point, but such phenomena have not been experimentally verified. In this report we ex...

journal_title：Biophysical journal

authors： Marshall WF

更新日期：2007-09-01 00:00:00