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466 Newest Publications in proceedings of the national academy of sciences current issue

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Siderocalin-mediated recognition, sensitization, and cellular uptake of actinides [Chemistry]

18-Aug-2015 | Benjamin E. Allred; Peter B. Rupert; Stacey S. Gauny; Dahlia D. An; Corie Y. Ralston; Manuel Sturzbecher-Hoehne; Rol ..., Proceedings of the National Academy of Sciences current issue, 2015

Synthetic radionuclides, such as the transuranic actinides plutonium, americium, and curium, present severe health threats as contaminants, and understanding the scope of the biochemical interactions involved in actinide transport is instrumental in managing human contamination. Here we show that ...

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Defect tolerance and the effect of structural inhomogeneity in plasmonic DNA-nanoparticle superlattices [Chemistry]

18-Aug-2015 | Michael B. Ross; Jessie C. Ku; Martin G. Blaber; Chad A. Mirkin; George C. Schatz, Proceedings of the National Academy of Sciences current issue, 2015

Bottom-up assemblies of plasmonic nanoparticles exhibit unique optical effects such as tunable reflection, optical cavity modes, and tunable photonic resonances. Here, we compare detailed simulations with experiment to explore the effect of structural inhomogeneity on the optical response in ...

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Correction to Supporting Information for Delley et al., Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates [Chemistry]

11-Aug-2015 | Proceedings of the National Academy of Sciences current issue, 2015

CHEMISTRY Correction to Supporting Information for “Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates,” by Murielle F. Delley, Francisco Núñez-Zarur, Matthew P. Conley, Aleix Comas-Vives, Georges Siddiqi, Sébastien Norsic, Vincent Monteil, ...

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Correction for Delley et al., Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates [Correction]

11-Aug-2015 | Proceedings of the National Academy of Sciences current issue, 2015

CHEMISTRY Correction for “Proton transfers are key elementary steps in ethylene polymerization on isolated chromium(III) silicates,” by Murielle F. Delley, Francisco Núñez-Zarur, Matthew P. Conley, Aleix Comas-Vives, Georges Siddiqi, Sébastien Norsic, Vincent Monteil, Olga V. Safonova, and ...

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Sequence, structure, and cooperativity in folding of elementary protein structural motifs [Chemistry]

11-Aug-2015 | Jason K. Lai; Ginka S. Kubelka; Jan Kubelka, Proceedings of the National Academy of Sciences current issue, 2015

Residue-level unfolding of two helix-turn-helix proteins—one naturally occurring and one de novo designed—is reconstructed from multiple sets of site-specific 13C isotopically edited infrared (IR) and circular dichroism (CD) data using Ising-like statistical-mechanical models. Several model ...

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Insights into G-quadruplex specific recognition by the DEAH-box helicase RHAU: Solution structure of a peptide-quadruplex complex [Chemistry]

04-Aug-2015 | Brahim Heddi; Vee Vee Cheong; Herry Martadinata; Anh Tuân Phan, Proceedings of the National Academy of Sciences current issue, 2015

Four-stranded nucleic acid structures called G-quadruplexes have been associated with important cellular processes, which should require G-quadruplex–protein interaction. However, the structural basis for specific G-quadruplex recognition by proteins has not been understood. The DEAH ...

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Active and widespread halogen chemistry in the tropical and subtropical free troposphere [Earth, Atmospheric, and Planetary Sciences]

28-Jul-2015 | Siyuan Wang; Johan A. Schmidt; Sunil Baidar; Sean Coburn; Barbara Dix; Theodore K. Koenig; Eric Apel; Dene Bowdalo; ..., Proceedings of the National Academy of Sciences current issue, 2015

Halogens in the troposphere are increasingly recognized as playing an important role for atmospheric chemistry, and possibly climate. Bromine and iodine react catalytically to destroy ozone (O3), oxidize mercury, and modify oxidative capacity that is relevant for the lifetime of greenhouse gases. ...

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Differential sensing for the regio- and stereoselective identification and quantitation of glycerides [Chemistry]

28-Jul-2015 | Katharine L. Diehl; Michelle Adams Ivy; Scott Rabidoux; Stefan Matthias Petry; Günter Müller; Eric V. Anslyn, Proceedings of the National Academy of Sciences current issue, 2015

Glycerides are of interest to the areas of food science and medicine because they are the main component of fat. From a chemical sensing perspective, glycerides are challenging analytes because they are structurally similar to one another and lack diversity in terms of functional groups. ...

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Cysteine cathepsins are essential in lysosomal degradation of {alpha}-synuclein [Chemistry]

28-Jul-2015 | Ryan P. McGlinchey; Jennifer C. Lee, Proceedings of the National Academy of Sciences current issue, 2015

A cellular feature of Parkinson’s disease is cytosolic accumulation and amyloid formation of α-synuclein (α-syn), implicating a misregulation or impairment of protein degradation pathways involving the proteasome and lysosome. Within lysosomes, cathepsin D (CtsD), an aspartyl protease, is ...

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Light-driven generation of hydrogen: New chromophore dyads for increased activity based on Bodipy dye and Pt(diimine)(dithiolate) complexes [Chemistry]

28-Jul-2015 | Bo Zheng; Randy P. Sabatini; Wen-Fu Fu; Min-Sik Eum; William W. Brennessel; Lidong Wang; David W. McCamant; Richard ..., Proceedings of the National Academy of Sciences current issue, 2015

New dyads consisting of a strongly absorbing Bodipy (dipyrromethene-BF2) dye and a platinum diimine dithiolate (PtN2S2) charge transfer (CT) chromophore have been synthesized and studied in the context of the light-driven generation of H2 from aqueous protons. In these dyads, the Bodipy dye is ...

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