Results 211 to 220 of about 737,390 (249)

G-Quadruplexes and Metal Ions

2011
Metal ions stabilize quadruplex nucleic acids by coordinating the O6 guanine atoms from G-quartets. These quartets form the basic motif of quadruplex structures. This article systematically surveys the available crystallographic data on native quadruplexes, their ligand complexes and (in one instance) a protein complex.
Nancy H, Campbell, Stephen, Neidle
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Tolerance ofAzotobacter for metallic and non-metallic ions

Antonie van Leeuwenhoek, 1971
The effect of 51 different inorganic salts on the growth of threeAzotobacter strains was studied by means of a diffusion technique in which 10−4 mole of each salt was deposited in the centre of a solid medium in a petri dish previously streaked with anAzotobacter suspension.
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Metal Ion Binding to RNA

2011
RNA crystal structures have provided a wealth of information on localized metal ions that are bound to specific sites, such as the RNA deep groove, the Hoogsteen face of guanine nucleotides and anionic phosphate oxygens. With a number of crystal structures being solved with heavy metal derivatives and other “reporter” ions, sufficient information is ...
Pascal, Auffinger, Neena, Grover, Eric, Westhof   +2 more
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Interaction of Taurine With Metal Ions

2002
Taurine is capable of forming moderately stable complexes with copper(II) in which it acts as a monodentate, N-donor ligand. However, it binds to copper(II) less strongly than its carboxylic analogue β-alanine. This is probably due to the decreased basicity of the amino group on taurine. Since zinc(II) and copper(II) have similar coordination behaviour
E C, O'Brien, E, Farkas, K B, Nolan
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Peptides in the detection of metal ions

Analytical Methods
This review discusses the development and application of peptides in the detection of metal ions, revealing the efficiency, selectivity and potential in metal-peptides sensing system.
Xin-Yi Li, Xiao-Dong Zhou, Ji-Ming Hu
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Metal ion induced autoimmunity

Current Opinion in Immunology, 1995
Metal-induced autoimmunity is a well established but poorly understood phenomenon. Recent work has begun to elucidate the molecular interactions of metal ions with immune cells and self-proteins. Metal-induced presentation of cryptic self-peptides emerges as a possible mechanism for activation of 'metal-specific' T cells, challenging the hypothesis of ...
P, Griem, E, Gleichmann
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Metal Ions in the Atmosphere of Neptune

Science, 1995
Microwave propagation experiments performed with Voyager 2 at Neptune revealed sharp layers of electrons in Neptune's lower ionosphere with densities of ∼10 4 per cubic centimeter. These layers are reminiscent of the sporadic-E layers in the Earth's ionosphere, and when taken together with data from the other giant ...
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Roles of metal ions in nucleases

Current Opinion in Chemical Biology, 2008
The hydrolysis of phosphodiester bonds by metallonucleases is crucial to most aspects of nucleic acid processing. In recent years, studies of the classical restriction endonucleases have given way to the characterization of metallonucleases with widely divergent active site motifs.
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Origins of metal ions in biology

Nature, 1974
A FERREDOXIN may have been one of the earliest proteins formed. The evidence for this assumption was recently presented by Hall et al.1 based on the primary structures of several ferredoxins. Here, further evidence is reported for the early evolution of ferredoxins, and the origins of ferredoxins and other metalloproteins are discussed from an ...
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Metal Ions

2009
Joseph Daniel, Hena Ziaee
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