Two-Staged Magnetoresistance Driven by Ising-like Spin Sublattice in SrCo6O11 (2007)
Ishiwata, S., Terasaki, I., Ishii, F., Nagaosa, N., Mukuda, H., Kitaoka, Y., ...
A two-staged, uniaxial magnetoresistive effect has been discovered in SrCo6O11 having a layered hexagonal structure. Conduction electrons and localized Ising spins are in different sublattices but...
Viciu, L., Bos, J. W. G., Zandbergen, H. W., Huang, Q., Foo, M. L., Ishiwata, S., ...
The crystal structures of the NaxCoO2 phases based on three-layer NaCoO2, with x=0.32, x=0.51, x=0.60, x=0.75 and x=0.92, determined by powder neutron diffraction, are reported. The structures have...
Ghosh, Shankar, Kamaraju, N, Seto, M, Fujimori, A, Takeda, Y, Ishiwata, S, ...
Temperature-dependent micro-Raman studies of orthorhombic $CaFeO_{3}$ and rhombohedral $La_{0.33}Sr_{0.67}FeO_{3}$ were carried out with an aim to study the role of a lattice in the formation of the...
Valence changes associated with the metal-insulator transition in Bi$_{1-x}$La$_x$NiO$_3$ (2005)
Wadati, H., Takizawa, M., Tran, T. T., Tanaka, K., Mizokawa, T., Fujimori, A., ...
Perovskite-type BiNiO$_3$ is an insulating antiferromagnet in which a charge disproportionation occurs at the Bi site. La substitution for Bi suppresses the charge disproportionation and makes the...
Ishiwata, S., Azuma, M., Hanawa, M., Moritomo, Y., Ohishi, Y., Kato, K., ...
Metal-insulator transitions strongly coupled with lattice were found in Bi1-xLaxNiO3. Synchrotron X-ray powder diffraction revealed that pressure (P ~ 3 GPa, T = 300 K), temperature (T ~ 340 K, x =...
Ghosh, Shankar, Kamaraju, N, Seto, M, Fujimori, A, Takeda, Y, Ishiwata, S, ...
Temperature-dependent micro-Raman studies of orthorhombic $CaFeO_{3}$ and rhombohedral $La_{0.33}Sr_{0.67}FeO_{3}$ were carried out with an aim to study the role of a lattice in the formation of the...
Spin Trimer Antiferromagnetism in La4Cu3MoO12 (2005)
Qiu, Y, Broholm, C, Ishiwata, S, Azuma, M, Takano, M, Bewley, R, ...
Room-temperature ferromagnetism in Sr_(1-x)Y_xCoO_(3-delta) (0.2 < x < 0.25) (2004)
Kobayashi, W., Ishiwata, S., Terasaki, I., Takano, M., Grigoraviciute, I., Yamauchi, H., ...
We have measured magnetic susceptibility and resistivity of Sr$_{1-x}$Y$_x$CoO$_{3-\delta}$ ($x=$ 0.1, 0.15, 0.2, 0.215, 0.225, 0.25, 0.3, and 0.4), and have found that...
Spin-Trimer Antiferromagnetism in La$_4$Cu$_3$MoO$_{12}$ (2002)
Qiu, Y., Broholm, C., Ishiwata, S., Azuma, M., Takano, M., Bewley, R., ...
La$_4$Cu$_3$MoO$_{12}$ is a cluster antiferromagnet where copper spin-1/2 form a network of st rongly coupled spin-trimers. The magnetic properties of this material have bee n examined using magnetic...
Ishiwata, S, Miki, M, Shin, I, Funatsu, T, Yasuda, K, Dos Remedios, C G
Fluorescence resonance energy transfer (FRET) spectroscopy has been used to determine distances between probes attached to the most reactive sulfhydryl (SH1) group on individual myosin "heads." We...
Sasaki, Y C, Yasuda, K, Suzuki, Y, Ishibashi, T, Satoh, I, Fujiki, Y, ...
We have characterized the functional protein, myosin subfragment 1 (S1), attached to a gold substrate by the sulfhydryl groups of cysteine in proteins. The amino groups of the regulatory light chain...
Suzuki, N, Miyata, H, Ishiwata, S, Kinosita, K
By coating covalently the surface of a polystyrene bead (diameter = 1 micron) with gelsolin, we have succeeded in attaching the bead selectively at the barbed end of an actin filament and forming a...
Yasuda, K, Shindo, Y, Ishiwata, S
An isotonic control system for studying dynamic properties of single myofibrils was developed to evaluate the change of sarcomere lengths in glycerinated skeletal myofibrils under conditions of...
Fujita, H, Yasuda, K, Niitsu, S, Funatsu, T, Ishiwata, S
The muscle contractile apparatus has a highly ordered liquid crystalline structure. The molecular mechanism underlying the formation of this apparatus remains, however, to be elucidated. Selective...
Shimizu, H, Fujita, T, Ishiwata, S
The length of sarcomeres in isolated myofibrils fixed at both ends spontaneously oscillates when MgADP and Pi coexist with MgATP in the absence of Ca2+ (Okamura, N., and S. Ishiwata, 1988. J. Muscle...
Anazawa, T, Yasuda, K, Ishiwata, S
We have devised a simple method for measuring tension development of single myofibrils by micromanipulation with a pair of glass micro-needles. The tension was estimated from the deflection of a...
Miyamoto, S, Funatsu, T, Ishiwata, S, Fujime, S
As a final stage of cell signal transduction, secretory cells release hormones by exocytosis. Before secretory granules contact with the cell membrane for fusion, an actin-network barrier must...
Diffraction rings corresponding to the first, second, and third order were obtained by laser light illumination from a suspension of rabbit glycerinated psoas myofibrils (diameter, 1-2 microns;...
Microscopic analysis of the elastic properties of nebulin in skeletal myofibrils.
Yasuda, K, Anazawa, T, Ishiwata, S
The elastic properties of nebulin were studied by measuring the elasticity of single skeletal myofibrils, from which the portion of the thin filament located at the I band had been selectively...
Mechanical properties of single protein motor of muscle studied by optical tweezers.
Nishizaka, T, Miyata, H, Yoshikawa, H, Ishiwata, S, Kinosita, K
Mechanical measurements of single actomyosin motor force.
Miyata, H, Yoshikawa, H, Hakozaki, H, Suzuki, N, Furuno, T, Ikegami, A, ...
To elucidate the mechanism of force generation by actomyosin motor, a measuring system was constructed, in which an in vitro motility assay was combined with an optical trapping technique. An actin...
Skinned skeletal and cardiac muscle fibers exhibits spontaneous oscillatory contraction (SPOC) in the presence of MgATP, MgADP, and inorganic phosphate (Pi)1 but the molecular mechanism underlying...
Tropomyosin modulates pH dependence of isometric tension.
We investigated the effect of pH on isometric tension in actin filament-reconstituted and thin filament-reconstituted bovine cardiac muscle fibers in the pH range of 6.0-7.4. Thin filament was...
Temperature change does not affect force between single actin filaments and HMM from rabbit muscles.
Kawai, M, Kawaguchi, K, Saito, M, Ishiwata, S
The temperature dependence of sliding force, velocity, and unbinding force was studied on actin filaments when they were placed on heavy meromyosin (HMM) attached to a glass surface. A fluorescently...
Nishizaka, T, Seo, R, Tadakuma, H, Kinosita, K, Ishiwata, S
Load dependence of the lifetime of the rigor bonds formed between a single myosin molecule (either heavy meromyosin, HMM, or myosin subfragment-1, S1) and actin filament was examined in the absence...
Submillisecond rotational dynamics of spin-labeled myosin heads in myofibrils.
Thomas, D D, Ishiwata, S, Seidel, J C, Gergely, J
The rotational motion of crossbridges, formed when myosin heads bind to actin, is an essential element of most molecular models of muscle contraction. To obtain direct information about this...
Ishiwata, S, Manuck, B A, Seidel, J C, Gergely, J
The rotational motion of rigidly spin-labeled myosin heads of glycerinated myofibrils as reflected in saturation-transfer EPR spectra behaves to a first approximation as though the heads consist of...
Ishiwata, S, Muramatsu, K, Higuchi, H
We show in this paper that the change of the internal structure of a sarcomere in a rabbit glycerinated psoas muscle fiber can be examined by analyzing the intensity change of the first- and the...
The kinetics of dissociation from both ends of thick filaments in a muscle fiber was investigated by an optical diffraction method. The dissociation velocity of thick filaments at a sarcomere length...
Ishiwata, S, Miki, M, Shin, I, Funatsu, T, Yasuda, K, Dos Remedios, C G
Fluorescence resonance energy transfer (FRET) spectroscopy has been used to determine distances between probes attached to the most reactive sulfhydryl (SH1) group on individual myosin "heads." We...
Sasaki, Y C, Yasuda, K, Suzuki, Y, Ishibashi, T, Satoh, I, Fujiki, Y, ...
We have characterized the functional protein, myosin subfragment 1 (S1), attached to a gold substrate by the sulfhydryl groups of cysteine in proteins. The amino groups of the regulatory light chain...
Suzuki, N, Miyata, H, Ishiwata, S, Kinosita, K
By coating covalently the surface of a polystyrene bead (diameter = 1 micron) with gelsolin, we have succeeded in attaching the bead selectively at the barbed end of an actin filament and forming a...
Yasuda, K, Shindo, Y, Ishiwata, S
An isotonic control system for studying dynamic properties of single myofibrils was developed to evaluate the change of sarcomere lengths in glycerinated skeletal myofibrils under conditions of...
Fujita, H, Yasuda, K, Niitsu, S, Funatsu, T, Ishiwata, S
The muscle contractile apparatus has a highly ordered liquid crystalline structure. The molecular mechanism underlying the formation of this apparatus remains, however, to be elucidated. Selective...
Shimizu, H, Fujita, T, Ishiwata, S
The length of sarcomeres in isolated myofibrils fixed at both ends spontaneously oscillates when MgADP and Pi coexist with MgATP in the absence of Ca2+ (Okamura, N., and S. Ishiwata, 1988. J. Muscle...
Anazawa, T, Yasuda, K, Ishiwata, S
We have devised a simple method for measuring tension development of single myofibrils by micromanipulation with a pair of glass micro-needles. The tension was estimated from the deflection of a...
Miyamoto, S, Funatsu, T, Ishiwata, S, Fujime, S
As a final stage of cell signal transduction, secretory cells release hormones by exocytosis. Before secretory granules contact with the cell membrane for fusion, an actin-network barrier must...
Diffraction rings corresponding to the first, second, and third order were obtained by laser light illumination from a suspension of rabbit glycerinated psoas myofibrils (diameter, 1-2 microns;...
Microscopic analysis of the elastic properties of nebulin in skeletal myofibrils.
Yasuda, K, Anazawa, T, Ishiwata, S
The elastic properties of nebulin were studied by measuring the elasticity of single skeletal myofibrils, from which the portion of the thin filament located at the I band had been selectively...
Mechanical properties of single protein motor of muscle studied by optical tweezers.
Nishizaka, T, Miyata, H, Yoshikawa, H, Ishiwata, S, Kinosita, K
Mechanical measurements of single actomyosin motor force.
Miyata, H, Yoshikawa, H, Hakozaki, H, Suzuki, N, Furuno, T, Ikegami, A, ...
To elucidate the mechanism of force generation by actomyosin motor, a measuring system was constructed, in which an in vitro motility assay was combined with an optical trapping technique. An actin...
Skinned skeletal and cardiac muscle fibers exhibits spontaneous oscillatory contraction (SPOC) in the presence of MgATP, MgADP, and inorganic phosphate (Pi)1 but the molecular mechanism underlying...
Tropomyosin modulates pH dependence of isometric tension.
We investigated the effect of pH on isometric tension in actin filament-reconstituted and thin filament-reconstituted bovine cardiac muscle fibers in the pH range of 6.0-7.4. Thin filament was...
Temperature change does not affect force between single actin filaments and HMM from rabbit muscles.
Kawai, M, Kawaguchi, K, Saito, M, Ishiwata, S
The temperature dependence of sliding force, velocity, and unbinding force was studied on actin filaments when they were placed on heavy meromyosin (HMM) attached to a glass surface. A fluorescently...
Nishizaka, T, Seo, R, Tadakuma, H, Kinosita, K, Ishiwata, S
Load dependence of the lifetime of the rigor bonds formed between a single myosin molecule (either heavy meromyosin, HMM, or myosin subfragment-1, S1) and actin filament was examined in the absence...
Submillisecond rotational dynamics of spin-labeled myosin heads in myofibrils.
Thomas, D D, Ishiwata, S, Seidel, J C, Gergely, J
The rotational motion of crossbridges, formed when myosin heads bind to actin, is an essential element of most molecular models of muscle contraction. To obtain direct information about this...
Ishiwata, S, Manuck, B A, Seidel, J C, Gergely, J
The rotational motion of rigidly spin-labeled myosin heads of glycerinated myofibrils as reflected in saturation-transfer EPR spectra behaves to a first approximation as though the heads consist of...
Ishiwata, S, Muramatsu, K, Higuchi, H
We show in this paper that the change of the internal structure of a sarcomere in a rabbit glycerinated psoas muscle fiber can be examined by analyzing the intensity change of the first- and the...
The kinetics of dissociation from both ends of thick filaments in a muscle fiber was investigated by an optical diffraction method. The dissociation velocity of thick filaments at a sarcomere length...
Raised interleukin 6 concentrations as a predictor of postangioplasty restenosis
SUZUKI, T., ISHIWATA, S., HASEGAWA, K., YAMAMOTO, K., YAMAZAKI, T.
Alteration of DNA methylation levels in MRL lupus mice
MIZUGAKI, M, YAMAGUCHI, T, ISHIWATA, S, SHINDO, H, HISHINUMA, T, NOZAKI, S, ...
Recent reports suggest that DNA methylation is involved in the cause of autoimmune disease. We investigated the alteration of DNA methylation levels in lupus strains of mice, MRL/lpr as a model,...