Results 251 to 260 of about 365,940 (292)

General Classes and Functions of Four-Helix Bundle Cytokines

1998
Publisher Summary The 4α-helical cytokines are the dominant regulators of hemopoietic cell development and the state of activation of the effector cells of innate and acquired resistance to infections. They also play major roles in the regulation of whole body metabolism, physiology, and the response to pregnancy.
N A, Nicola, D J, Hilton
openaire   +2 more sources

Basic helix-loop-helix pioneer factors interact with the histone octamer to invade nucleosomes and generate nucleosome-depleted regions

Molecular Cell, 2022
SUMMARYNucleosomes drastically limit transcription factor (TF) occupancy, while pioneer transcription factors (PFs) somehow circumvent this nucleosome barrier. In this study, we compare nucleosome binding of two conserved S. cerevisiae basic helix-loop-helix (bHLH) TFs, Cbf1 and Pho4.
Benjamin T. Donovan, Hengye Chen, Priit Eek, Zhiyuan Meng, Caroline Jipa, Song Tan, Lu Bai, Michael G. Poirier   +7 more
openaire   +2 more sources

Chiral Sum Frequency Generation Spectroscopy Detects Double-Helix DNA at Interfaces

Langmuir, 2022
Many DNA-based technologies involve the immobilization of DNA and therefore require a fundamental understanding of the DNA structure-function relationship at interfaces. We present three immobilization methods compatible with chiral sum frequency generation (SFG) spectroscopy at interfaces. They are the "anchor" method for covalently attaching DNA on a
Ethan A. Perets, Kristian B. Olesen, Elsa C. Y. Yan   +2 more
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New results for general helix in Euclidean 3-space

AIP Conference Proceedings, 2018
Finding parametric equation of a space curve is not easy task when its curvature functions are given. It is well known that this problem is known as fundamental theorem of a space curve. If the curvature functions are functions of arc-length, the solution of this problem is usually impossible.
openaire   +2 more sources

Interactions between heterologous helix-loop-helix proteins generate complexes that bind specifically to a common DNA sequence

Cell, 1989
A DNA binding and dimerization motif, with apparent amphipathic helices (the HLH motif), has recently been identified in various proteins, including two that bind to immunoglobulin enhancers (E12 and E47). We show here that various HLH proteins can bind as apparent heterodimers to a single DNA motif and also, albeit usually more weakly, as apparent ...
Cornelis Murre, Patrick Schonleber McCaw, H. Vaessin, M. Caudy, L.Y. Jan, Y.N. Jan, Carlos V. Cabrera, Jean N. Buskin, Stephen D. Hauschka, Andrew B. Lassar, Harold Weintraub, David Baltimore   +11 more
openaire   +2 more sources

Sites of action potential generation in Helix pomatia neurons

Neurophysiology, 1988
The site of action potential generation in unipolar snail neurons was identified by stimulating neurons isolated together with the initial portion of the process from the neuropile. Stimulation consisted of a sinusoidal from electrical current passed along the soma-axonal axis in saline solution.
V. N. Ierusalimskii, P. M. Balaban
openaire   +1 more source

Generalized spin helix states in quantum spin graphs

Physica Scripta
Abstract In general, the summation of a set of sub-Hamiltonians cannot share a common eigenstate of each one, only if it is an unentangled product state, such as a spin helix state in quantum spin system. Here we present a method, referred to as the building block method (BBM), for constructing possible spin-1/2 XXZ Heisenberg lattice ...
C H Zhang, Y B Shi, Z Song
openaire   +1 more source

Broadband efficient vortex beam generation with metallic helix array

Applied Physics Letters, 2018
Vortex beams with orbital angular momentum are characterized by a helical phase front and a phase singularity at the beam center. Such beams have various intriguing applications, such as optical communications, particle trapping, and high resolution imaging. Generating a vortex beam by exploiting the geometric phase has attracted great interest, due to
Zhijie Gong, Chao Wu, Chaoqun Fang, Song Zhao, Anqi Sun, Zeyong Wei, Hongqiang Li   +6 more
openaire   +1 more source

Properties of plasmas generated by a sheath-helix antenna

IEEE Conference Record - Abstracts. PPPS-2001 Pulsed Power Plasma Science 2001. 28th IEEE International Conference on Plasma Science and 13th IEEE International Pulsed Power Conference (Cat. No.01CH37255), 2002
Summary form only given. A theoretical model of the plasmas generated by a sheath-helix antenna is developed for axisymmetric perturbations. The system configuration consists of a cylindrical plasma column inside a dielectric tube of radius R. The eigenvalue equation is obtained inside the plasma column and the eigenfunction is identified as the Bessel
H.S. Uhm, S.H. Uhm, H.-Y. Chang
openaire   +1 more source

Towards a general triple helix mediated DNA recognition scheme

Chemical Society Reviews, 1997
This review describes new perspectives offered by the synthesis of non-natural nucleosides to overcome current limitations and extend the triplex-mediated DNA recognition scheme to any sequence. Alternate strand purine binding, direct pyrimidine recognition, and binding to the whole base-pair are described. The review highlights structural requirements
Svetlana O. Doronina, Jean-Paul Behr
openaire   +1 more source