Results 291 to 300 of about 770,458 (344)

Molecular Conformation of Inosine

Nature, 1969
INOSINE is one of the rare nucleosides found in nucleic acids. It occurs especially in transfer ribonucleic acid where it appears to form part of a number of anticodons1,2. It can form a base pair with any one of the bases adenine, uracil or cytidine in the third codon1,2 position, and the possibility of atypical base pairs is part of the “wobble ...
P, Tollin, A R, Munns
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Molecular Conformation of GABA

Nature New Biology, 1971
CURTIS et al.1,2 have described evidence suggesting that the alkaloid bicuculline is a specific antagonist to the action of γ-aminobutyric acid (GABA), a possible inhibitory transmitter in the mammalian brain3,4. By considering structural models, they suggested3 as a stereochemical basis for this antagonism a geometrical configuration in which the N ...
E G, Steward, R, Player, J P, Quilliam, D A, Brown, M J, Pringle   +4 more
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Molecular Conformation of Deoxyuridine

Nature, 1971
THE structure determination of deoxyuridine was undertaken as part of a series of conformational studies of nucleic acid components. Such studies give information about the preferred conformation of nucleosides and nucleotides1,2, and may clarify the conformational differences and changes that occur in nucleic acids.
A, Rahman, H R, Wilson
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Conformational Molecular Rectifiers

Nano Letters, 2004
Unimolecular rectification based on voltage-controlled intramolecular stereochemical modification is suggested and computationally investigated. In sharp contrast to present molecular rectifiers, these conformational molecular rectifiers (CMRs) differ in principle from silicon structures, deriving their large, strongly temperature-dependent ...
Alessandro Troisi, Mark A. Ratner
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Molecular conformation of prostaglandin A1

Prostaglandins, 1973
Abstract The crystal and molecular structure of prostaglandin A1 (PGA1) has been determined by X-ray diffraction. (Space group P212121, a = 18.10 A A , b = 21.09 A A , c = 5.42, Z = 4) . Comparison of the structure of PGA1 with that of PGF1β (determined previously as the tribromobenzoate) indicates significant ...
W L, Duax, J W, Edmonds
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Molecular Conformations of 5-Iodouridine

Nature, 1970
THE structure of unusual nucleic acid components is of importance in relation to conformational and model building studies on nucleic acids in general and those concerning tRNA in particular. In the case of 5-iodouridine (Fig. 1) it is particularly desirable to know the crystal structure in order to compare the effects of ionizing radiation on single ...
A, Rahman, H R, Wilson
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Molecular conformation of L-DOPA

Biochemical and Biophysical Research Communications, 1970
Abstract The structure of L-DOPA, a biological precursor of melanins has been determined by a new systematic analysis of the Patterson function. Its molecular conformation is different from that so far reported for any aromatic aminoacid, peptide or related compound.
J W, Becker, Y T, Thathachari, P G, Simpson   +2 more
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Hyaluronates: Relation between Molecular Conformations

Science, 1973
The discovery that both potassium and sodium salts of hyaluronic acid can exist in a double-strand helical conformation that will convert to the already known single-strand helical structures illustrates the remarkable conformational versatility of this biopolymer. X-ray diffraction was used to monitor variations in molecular conformation as a function
E D, Atkins, J K, Sheehan
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Molecular Signal Transduction by Conformational Transmission

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Ulrich Koert, Rolf Krauss
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Sampling of molecular conformations by molecular dynamics techniques

Molecular Physics, 1993
In this paper we compare two different sampling methods for probing the distribution of conformations of a flexible molecule. The first method makes use of a form of umbrella sampling which effectively enhances the crossing of energy barriers. The second method, the so-called blue moon ensemble, is based on the use of an holonomic constraint which ...
Ciccotti, Giovanni, Depaepe, Jean-Michel, Paci, E., Ryckaert, Jean-Paul   +3 more
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