Results 221 to 230 of about 740,120 (268)

Structure of Poly (dT)·Poly (dA)·Poly (dT)

Journal of Biomolecular Structure and Dynamics, 2000
The molecular structure of poly (dT).poly (dA).poly (dT) has been determined and refined using the continuous x-ray intensity data on layer lines in the diffraction pattern obtained from an oriented fiber of the DNA. The final R-value for the preferred structure is 0.29 significantly lower than that for plausible alternatives.
R, Chandrasekaran, A, Giacometti, S, Arnott   +2 more
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Structures for the polynucleotide complexes poly(dA) · poly(dT) and poly(dT) · poly(dA) · poly(dT)

Journal of Molecular Biology, 1974
X-ray diffraction analyses of fibers of polydeoxyadenylic acid · polydeoxythymidylic acid show that this molecule exists as a 10-fold double-helix with axial rise per nucleotide h = 3.24 to 3.29 A. The structure is very similar to B-DNA (h = 3.37 A) in having C3-exo furanose rings and base-pairs positioned centrally on the helix axis, but distinctive ...
Struther Arnott, Erik Selsing
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Pulsed Electric Linear Dichroism of Poly(dA)·Poly(dT)·Poly(dT) and Poly(rA)·Poly(rU)·Poly(rU) in Solutions

Bulletin of the Chemical Society of Japan, 1997
Abstract The dependence of reduced dichroism (Δε/ε) of sonicated rodlike title triplexes with the counterion Mg2+, (dA)n·(dT)n·(dT′)n and (rA)n·(rU)n·(rU′)n, on the wavelength (190—300 nm) and on the applied-field strength (3.8—23.1 kV cm−1) was studied in aqueous ionic solutions at 7 °C.
Noriyuki Ojima, Kunihiko Gekko, Kiwamu Yamaoka   +2 more
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Structural transitions in poly(A), poly(C), poly(U), and poly(G) and their possible biological roles

Journal of Biomolecular Structure and Dynamics, 2018
The homopolynucleotide (homo-oligonucleotide) tracts function as regulatory elements at various stages of mRNAs life cycle. Numerous cellular proteins specifically bind to these tracts. Among them are the different poly(A)-binding proteins, poly(C)-binding proteins, multifunctional fragile X mental retardation protein which binds specifically both to ...
Margarita I. Zarudnaya, Iryna M. Kolomiets, Andriy L. Potyahaylo, Dmytro M. Hovorun   +3 more
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Raman studies of nucleic acids. VII. Poly A · poly U and poly G · Poly C

Biopolymers, 1972
AbstractLaser‐excited Raman spectra of the double‐helical complexes poly A·poly U and poly G·poly C are reported for 2H2O and H2O solutions. The spectra are discussed in relation to their use as quantitative reference spectra for determining the dependence of the Raman scattering of RNA on secondary structure.
L, Lafleur, J, Rice, G J, Thomas
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Structures for Poly(U).poly(A).poly(U) Triple Stranded Polynucleotides

Nature New Biology, 1973
X-ray fibre diffraction studies indicate suitability of triple stranded polynucleotides for biological role.
S, Arnott, P J, Bond
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Poly(A):Poly(U); Poly(O8A):Poly(U); Poly(A):Poly(MeNH5U) and poly(O8A):Poly(MeNH5U) versus bida semliki forest virus in chick embryos

Toxicology Letters, 1982
Poly(A):poly(U) (polyadenylic acid:polyuridylic acid hybrid); poly(O8A):poly(U) (poly-8-oxy-adenylic acid:polyuridylic acid hybrid); poly(A):poly(MeNH5U) (polyadenylic acid-5-methylamino uridylic acid hybrid) and poly(O8A):poly(MeNH5U) (poly-8-oxyadenylic acid:poly-5-methylamino uridylic acid hybrid) were studied in chick embryos to compare the ...
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A circular dichroism study of poly dG, poly dC, and poly dG:dC

Biopolymers, 1974
AbstractWe have measured the ultraviolet circular dichroism spectra of oligo d(pG)5, poly dN AcG, poly dI, poly dC, two samples of poly dG, and four samples containing double‐stranded poly dG:dC. We find that oligo d(pG)5 and poly dG exist in self‐complexed forms as well as in single‐stranded forms. Unlike the self‐complexed form of poly dG, the single‐
Donald M. Gray, F. J. Bollum
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Poly(organosilanes), Poly(carbosilanes), Poly(organosilazanes)

1996
Attempts to completely replace the carbon in n-alkanes by the next element of group IV, silicon has been of special interest to practical as well as theoretical chemists ever since the work of Kipping [1]. Interest in the group of compounds, known as poly(organosilanes) 2b has not diminished to the present day, especially since it is a well known fact ...
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Roles of mRNA poly(A) tails in regulation of eukaryotic gene expression

Nature Reviews Molecular Cell Biology, 2021
Lori A Passmore, Jeff Coller, Passmore Lori A   +2 more
exaly