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  • 1
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    Protein lysine de-2-hydroxyisobutyrylation by CobB in prokaryotes (2019)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2019
    Description: 〈p〉Lysine 2-hydroxyisobutyrylation (Khib) has recently been shown to be an evolutionarily conserved histone mark. Here, we report that CobB serves as a lysine de-2-hydroxyisobutyrylation enzyme that regulates glycolysis and cell growth in prokaryotes. We identified the specific binding of CobB to Khib using a novel self-assembled multivalent photocrosslinking peptide probe and demonstrated that CobB can catalyze lysine de-2-hydroxyisobutyrylation both in vivo and in vitro. R58 of CobB is a critical site for its de-2-hydroxyisobutyrylase activity. Using a quantitative proteomics approach, we identified 99 endogenous substrates that are targeted by CobB for de-2-hydroxyisobutyrylation. We further demonstrated that CobB can regulate the catalytic activities of enolase (ENO) by removing K343hib and K326ac of ENO simultaneously, which account for changes of bacterial growth. In brief, our study dissects a Khib-mediated molecular mechanism that is catalyzed by CobB for the regulation of the activity of metabolic enzymes as well as the cell growth of bacteria.〈/p〉
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
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  • 2
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    A draft sequence of the rice genome (Oryza sativa L. ssp. indica) (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-06
    Description: We have produced a draft sequence of the rice genome for the most widely cultivated subspecies in China, Oryza sativa L. ssp. indica, by whole-genome shotgun sequencing. The genome was 466 megabases in size, with an estimated 46,022 to 55,615 genes. Functional coverage in the assembled sequences was 92.0%. About 42.2% of the genome was in exact 20-nucleotide oligomer repeats, and most of the transposons were in the intergenic regions between genes. Although 80.6% of predicted Arabidopsis thaliana genes had a homolog in rice, only 49.4% of predicted rice genes had a homolog in A. thaliana. The large proportion of rice genes with no recognizable homologs is due to a gradient in the GC content of rice coding sequences.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, Jun -- Hu, Songnian -- Wang, Jun -- Wong, Gane Ka-Shu -- Li, Songgang -- Liu, Bin -- Deng, Yajun -- Dai, Li -- Zhou, Yan -- Zhang, Xiuqing -- Cao, Mengliang -- Liu, Jing -- Sun, Jiandong -- Tang, Jiabin -- Chen, Yanjiong -- Huang, Xiaobing -- Lin, Wei -- Ye, Chen -- Tong, Wei -- Cong, Lijuan -- Geng, Jianing -- Han, Yujun -- Li, Lin -- Li, Wei -- Hu, Guangqiang -- Huang, Xiangang -- Li, Wenjie -- Li, Jian -- Liu, Zhanwei -- Li, Long -- Liu, Jianping -- Qi, Qiuhui -- Liu, Jinsong -- Li, Li -- Li, Tao -- Wang, Xuegang -- Lu, Hong -- Wu, Tingting -- Zhu, Miao -- Ni, Peixiang -- Han, Hua -- Dong, Wei -- Ren, Xiaoyu -- Feng, Xiaoli -- Cui, Peng -- Li, Xianran -- Wang, Hao -- Xu, Xin -- Zhai, Wenxue -- Xu, Zhao -- Zhang, Jinsong -- He, Sijie -- Zhang, Jianguo -- Xu, Jichen -- Zhang, Kunlin -- Zheng, Xianwu -- Dong, Jianhai -- Zeng, Wanyong -- Tao, Lin -- Ye, Jia -- Tan, Jun -- Ren, Xide -- Chen, Xuewei -- He, Jun -- Liu, Daofeng -- Tian, Wei -- Tian, Chaoguang -- Xia, Hongai -- Bao, Qiyu -- Li, Gang -- Gao, Hui -- Cao, Ting -- Wang, Juan -- Zhao, Wenming -- Li, Ping -- Chen, Wei -- Wang, Xudong -- Zhang, Yong -- Hu, Jianfei -- Wang, Jing -- Liu, Song -- Yang, Jian -- Zhang, Guangyu -- Xiong, Yuqing -- Li, Zhijie -- Mao, Long -- Zhou, Chengshu -- Zhu, Zhen -- Chen, Runsheng -- Hao, Bailin -- Zheng, Weimou -- Chen, Shouyi -- Guo, Wei -- Li, Guojie -- Liu, Siqi -- Tao, Ming -- Wang, Jian -- Zhu, Lihuang -- Yuan, Longping -- Yang, Huanming -- 1 RO1 ES09909/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 2002 Apr 5;296(5565):79-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Beijing Genomics Institute/Center of Genomics and Bioinformatics, Chinese Academy of Sciences, Beijing 101300, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11935017" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/genetics ; Base Composition ; Computational Biology ; Contig Mapping ; DNA Transposable Elements ; DNA, Intergenic ; DNA, Plant/chemistry/genetics ; Databases, Nucleic Acid ; Exons ; Gene Duplication ; Genes, Plant ; *Genome, Plant ; Genomics ; Introns ; Molecular Sequence Data ; Oryza/*genetics ; Plant Proteins/chemistry/genetics ; Polymorphism, Genetic ; Repetitive Sequences, Nucleic Acid ; *Sequence Analysis, DNA ; Sequence Homology, Nucleic Acid ; Software ; Species Specificity ; Synteny
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Retroviral recombination and reverse transcription (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-11-30
    Description: Recombination occurs at a high rate in retroviral replication, and its observation requires a virion containing two different RNA molecules (heterodimeric particles). Analysis of retroviral recombinants formed after a single round of replication revealed that (i) the nonselected markers changed more frequently than expected from the rate of recombination of selected markers; (ii) the transfer of the initially synthesized minus strand strong stop DNA was either intramolecular or intermolecular; (iii) the transfer of the first synthesized plus strand strong stop DNA was always intramolecular; and (iv) there was a strong correlation between the type of transfer of the minus strand strong stop DNA and the number of template switches observed. These data suggest that retroviral recombination is ordered and occurs during the synthesis of both minus and plus strand DNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hu, W S -- Temin, H M -- CA-07175/CA/NCI NIH HHS/ -- CA-22443/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1990 Nov 30;250(4985):1227-33.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉McArdle Laboratory for Cancer Research, University of Wisconsin-Madison 53706.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1700865" target="_blank"〉PubMed〈/a〉
    Keywords: Biological Evolution ; DNA, Viral/biosynthesis/genetics ; Drug Resistance/genetics ; Genetic Vectors ; Neomycin ; Osteosarcoma ; RNA, Viral/genetics ; RNA-Directed DNA Polymerase ; *Recombination, Genetic ; Repetitive Sequences, Nucleic Acid ; Restriction Mapping ; Retroviridae/*genetics/physiology ; T-Lymphocytes, Helper-Inducer/microbiology ; Templates, Genetic ; *Transcription, Genetic ; Transfection ; Tumor Cells, Cultured ; Virion/genetics ; Virus Replication
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Activity-dependent regulation of MEF2 transcription factors suppresses excitatory synapse number (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-02-18
    Description: In the mammalian nervous system, neuronal activity regulates the strength and number of synapses formed. The genetic program that coordinates this process is poorly understood. We show that myocyte enhancer factor 2 (MEF2) transcription factors suppressed excitatory synapse number in a neuronal activity- and calcineurin-dependent manner as hippocampal neurons formed synapses. In response to increased neuronal activity, calcium influx into neurons induced the activation of the calcium/calmodulin-regulated phosphatase calcineurin, which dephosphorylated and activated MEF2. When activated, MEF2 promoted the transcription of a set of genes, including arc and synGAP, that restrict synapse number. These findings define an activity-dependent transcriptional program that may control synapse number during development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Flavell, Steven W -- Cowan, Christopher W -- Kim, Tae-Kyung -- Greer, Paul L -- Lin, Yingxi -- Paradis, Suzanne -- Griffith, Eric C -- Hu, Linda S -- Chen, Chinfei -- Greenberg, Michael E -- AG05870/AG/NIA NIH HHS/ -- HD18655/HD/NICHD NIH HHS/ -- NS28829/NS/NINDS NIH HHS/ -- R01 EY013613/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2006 Feb 17;311(5763):1008-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Neurobiology Program, Children's Hospital, and Departments of Neurology and Neurobiology, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16484497" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcineurin/metabolism ; Calcium/metabolism ; Cells, Cultured ; Cytoskeletal Proteins/genetics ; Dendrites/physiology/ultrastructure ; Excitatory Postsynaptic Potentials ; GTPase-Activating Proteins/genetics ; Gene Expression Regulation ; Glutamic Acid/metabolism ; Hippocampus/cytology/*physiology ; MEF2 Transcription Factors ; Mutation ; Myogenic Regulatory Factors/genetics/*physiology ; Nerve Tissue Proteins/genetics ; Neurons/*physiology ; Oligonucleotide Array Sequence Analysis ; Phosphorylation ; RNA Interference ; Rats ; Rats, Long-Evans ; Recombinant Fusion Proteins/metabolism ; Synapses/*physiology ; Synaptic Transmission ; Transcription, Genetic ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Photoacoustic tomography: in vivo imaging from organelles to organs (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-03-24
    Description: Photoacoustic tomography (PAT) can create multiscale multicontrast images of living biological structures ranging from organelles to organs. This emerging technology overcomes the high degree of scattering of optical photons in biological tissue by making use of the photoacoustic effect. Light absorption by molecules creates a thermally induced pressure jump that launches ultrasonic waves, which are received by acoustic detectors to form images. Different implementations of PAT allow the spatial resolution to be scaled with the desired imaging depth in tissue while a high depth-to-resolution ratio is maintained. As a rule of thumb, the achievable spatial resolution is on the order of 1/200 of the desired imaging depth, which can reach up to 7 centimeters. PAT provides anatomical, functional, metabolic, molecular, and genetic contrasts of vasculature, hemodynamics, oxygen metabolism, biomarkers, and gene expression. We review the state of the art of PAT for both biological and clinical studies and discuss future prospects.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3322413/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3322413/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Lihong V -- Hu, Song -- R01 CA134539/CA/NCI NIH HHS/ -- R01 CA134539-04/CA/NCI NIH HHS/ -- R01 CA157277/CA/NCI NIH HHS/ -- R01 CA157277-02/CA/NCI NIH HHS/ -- R01 CA159959/CA/NCI NIH HHS/ -- R01 CA159959-01/CA/NCI NIH HHS/ -- R01 EB000712/EB/NIBIB NIH HHS/ -- R01 EB000712-09/EB/NIBIB NIH HHS/ -- R01 EB008085/EB/NIBIB NIH HHS/ -- R01 EB008085-04/EB/NIBIB NIH HHS/ -- R01 EB010049/EB/NIBIB NIH HHS/ -- R01 EB010049-03/EB/NIBIB NIH HHS/ -- U54 CA136398/CA/NCI NIH HHS/ -- U54 CA136398-05/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2012 Mar 23;335(6075):1458-62. doi: 10.1126/science.1216210.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University, St. Louis, MO 63130, USA. lhwang@wustl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22442475" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Physiological Processes ; Cells/ultrastructure ; Genetic Processes ; Humans ; Lasers ; Organelles/ultrastructure ; *Photoacoustic Techniques/instrumentation/methods ; *Physiological Processes ; *Tomography/instrumentation/methods
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 6
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    Global epigenomic reconfiguration during mammalian brain development (2013)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2013-07-06
    Description: DNA methylation is implicated in mammalian brain development and plasticity underlying learning and memory. We report the genome-wide composition, patterning, cell specificity, and dynamics of DNA methylation at single-base resolution in human and mouse frontal cortex throughout their lifespan. Widespread methylome reconfiguration occurs during fetal to young adult development, coincident with synaptogenesis. During this period, highly conserved non-CG methylation (mCH) accumulates in neurons, but not glia, to become the dominant form of methylation in the human neuronal genome. Moreover, we found an mCH signature that identifies genes escaping X-chromosome inactivation. Last, whole-genome single-base resolution 5-hydroxymethylcytosine (hmC) maps revealed that hmC marks fetal brain cell genomes at putative regulatory regions that are CG-demethylated and activated in the adult brain and that CG demethylation at these hmC-poised loci depends on Tet2 activity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3785061/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3785061/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lister, Ryan -- Mukamel, Eran A -- Nery, Joseph R -- Urich, Mark -- Puddifoot, Clare A -- Johnson, Nicholas D -- Lucero, Jacinta -- Huang, Yun -- Dwork, Andrew J -- Schultz, Matthew D -- Yu, Miao -- Tonti-Filippini, Julian -- Heyn, Holger -- Hu, Shijun -- Wu, Joseph C -- Rao, Anjana -- Esteller, Manel -- He, Chuan -- Haghighi, Fatemeh G -- Sejnowski, Terrence J -- Behrens, M Margarita -- Ecker, Joseph R -- AI44432/AI/NIAID NIH HHS/ -- CA151535/CA/NCI NIH HHS/ -- HD065812/HD/NICHD NIH HHS/ -- HG006827/HG/NHGRI NIH HHS/ -- K99NS080911/NS/NINDS NIH HHS/ -- MH094670/MH/NIMH NIH HHS/ -- R01 AI044432/AI/NIAID NIH HHS/ -- R01 CA151535/CA/NCI NIH HHS/ -- R01 HD065812/HD/NICHD NIH HHS/ -- R01 HG006827/HG/NHGRI NIH HHS/ -- R01 MH094670/MH/NIMH NIH HHS/ -- R01 MH094774/MH/NIMH NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2013 Aug 9;341(6146):1237905. doi: 10.1126/science.1237905. Epub 2013 Jul 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Genomic Analysis Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA. ryan.lister@uwa.edu.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23828890" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine/metabolism ; Adult ; Animals ; Base Sequence ; Conserved Sequence ; Cytosine/*analogs & derivatives/metabolism ; *DNA Methylation ; *Epigenesis, Genetic ; Epigenomics ; Frontal Lobe/*growth & development ; *Gene Expression Regulation, Developmental ; Genome-Wide Association Study ; Humans ; Longevity ; Mice ; Mice, Inbred C57BL ; X Chromosome Inactivation/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 7
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    Dinitrogen cleavage and hydrogenation by a trinuclear titanium polyhydride complex (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-07-03
    Description: Both the Haber-Bosch and biological ammonia syntheses are thought to rely on the cooperation of multiple metals in breaking the strong N identical withN triple bond and forming an N-H bond. This has spurred investigations of the reactivity of molecular multimetallic hydrides with dinitrogen. We report here the reaction of a trinuclear titanium polyhydride complex with dinitrogen, which induces dinitrogen cleavage and partial hydrogenation at ambient temperature and pressure. By (1)H and (15)N nuclear magnetic resonance, x-ray crystallographic, and computational studies of some key reaction steps and products, we have determined that the dinitrogen (N2) reduction proceeds sequentially through scission of a N2 molecule bonded to three Ti atoms in a mu-eta(1):eta(2):eta(2)-end-on-side-on fashion to give a mu2-N/mu3-N dinitrido species, followed by intramolecular hydrogen migration from Ti to the mu2-N nitrido unit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shima, Takanori -- Hu, Shaowei -- Luo, Gen -- Kang, Xiaohui -- Luo, Yi -- Hou, Zhaomin -- New York, N.Y. -- Science. 2013 Jun 28;340(6140):1549-52. doi: 10.1126/science.1238663.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23812710" target="_blank"〉PubMed〈/a〉
    Keywords: Catalysis ; Crystallography, X-Ray ; Hydrogenation ; Magnetic Resonance Spectroscopy ; Nitrogen/*chemistry ; Titanium/*chemistry
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    Electronic ISSN: 1095-9203
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  • 8
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    Stress-dependent regulation of FOXO transcription factors by the SIRT1 deacetylase (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-02-21
    Description: The Sir2 deacetylase modulates organismal life-span in various species. However, the molecular mechanisms by which Sir2 increases longevity are largely unknown. We show that in mammalian cells, the Sir2 homolog SIRT1 appears to control the cellular response to stress by regulating the FOXO family of Forkhead transcription factors, a family of proteins that function as sensors of the insulin signaling pathway and as regulators of organismal longevity. SIRT1 and the FOXO transcription factor FOXO3 formed a complex in cells in response to oxidative stress, and SIRT1 deacetylated FOXO3 in vitro and within cells. SIRT1 had a dual effect on FOXO3 function: SIRT1 increased FOXO3's ability to induce cell cycle arrest and resistance to oxidative stress but inhibited FOXO3's ability to induce cell death. Thus, one way in which members of the Sir2 family of proteins may increase organismal longevity is by tipping FOXO-dependent responses away from apoptosis and toward stress resistance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brunet, Anne -- Sweeney, Lora B -- Sturgill, J Fitzhugh -- Chua, Katrin F -- Greer, Paul L -- Lin, Yingxi -- Tran, Hien -- Ross, Sarah E -- Mostoslavsky, Raul -- Cohen, Haim Y -- Hu, Linda S -- Cheng, Hwei-Ling -- Jedrychowski, Mark P -- Gygi, Steven P -- Sinclair, David A -- Alt, Frederick W -- Greenberg, Michael E -- NIHP30-HD18655/HD/NICHD NIH HHS/ -- P01 NS35138-17/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2004 Mar 26;303(5666):2011-5. Epub 2004 Feb 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuroscience, Children's Hospital, and Department of Neurobiology, Center for Blood Research (CBR) Institute for Biomedical Research, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14976264" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Animals ; Apoptosis ; Cell Cycle ; Cell Line ; Cell Nucleus/metabolism ; Cells, Cultured ; Cerebellum/cytology ; Forkhead Transcription Factors ; Gene Expression Profiling ; Gene Expression Regulation ; Histone Deacetylases/genetics/*metabolism ; Humans ; Intracellular Signaling Peptides and Proteins ; Mice ; Mice, Knockout ; Neurons/cytology ; *Oxidative Stress ; Phosphorylation ; Proteins/genetics ; Recombinant Proteins/metabolism ; Sirtuin 1 ; Sirtuins/genetics/*metabolism ; Transcription Factors/genetics/*metabolism ; Transcription, Genetic
    Print ISSN: 0036-8075
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  • 9
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    Cyclic variation and solar forcing of Holocene climate in the Alaskan subarctic (2003)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2003-09-27
    Description: High-resolution analyses of lake sediment from southwestern Alaska reveal cyclic variations in climate and ecosystems during the Holocene. These variations occurred with periodicities similar to those of solar activity and appear to be coherent with time series of the cosmogenic nuclides 14C and 10Be as well as North Atlantic drift ice. Our results imply that small variations in solar irradiance induced pronounced cyclic changes in northern high-latitude environments. They also provide evidence that centennial-scale shifts in the Holocene climate were similar between the subpolar regions of the North Atlantic and North Pacific, possibly because of Sun-ocean-climate linkages.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hu, Feng Sheng -- Kaufman, Darrell -- Yoneji, Sumiko -- Nelson, David -- Shemesh, Aldo -- Huang, Yongsong -- Tian, Jian -- Bond, Gerard -- Clegg, Benjamin -- Brown, Thomas -- New York, N.Y. -- Science. 2003 Sep 26;301(5641):1890-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Biology, University of Illinois, Urbana, IL 61801, USA. fshu@life.uiuc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14512624" target="_blank"〉PubMed〈/a〉
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  • 10
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    Amorphous TiO(2) coatings stabilize Si, GaAs, and GaP photoanodes for efficient water oxidation (2014)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2014-05-31
    Description: Although semiconductors such as silicon (Si), gallium arsenide (GaAs), and gallium phosphide (GaP) have band gaps that make them efficient photoanodes for solar fuel production, these materials are unstable in aqueous media. We show that TiO2 coatings (4 to 143 nanometers thick) grown by atomic layer deposition prevent corrosion, have electronic defects that promote hole conduction, and are sufficiently transparent to reach the light-limited performance of protected semiconductors. In conjunction with a thin layer or islands of Ni oxide electrocatalysts, Si photoanodes exhibited continuous oxidation of 1.0 molar aqueous KOH to O2 for more than 100 hours at photocurrent densities of 〉30 milliamperes per square centimeter and ~100% Faradaic efficiency. TiO2-coated GaAs and GaP photoelectrodes exhibited photovoltages of 0.81 and 0.59 V and light-limiting photocurrent densities of 14.3 and 3.4 milliamperes per square centimeter, respectively, for water oxidation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hu, Shu -- Shaner, Matthew R -- Beardslee, Joseph A -- Lichterman, Michael -- Brunschwig, Bruce S -- Lewis, Nathan S -- New York, N.Y. -- Science. 2014 May 30;344(6187):1005-9. doi: 10.1126/science.1251428.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA. Joint Center for Artificial Photosynthesis, California Institute of Technology, Pasadena, CA 91125, USA. ; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA. ; Beckman Institute and Molecular Materials Research Center, California Institute of Technology, Pasadena, CA 91125, USA. ; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA. Joint Center for Artificial Photosynthesis, California Institute of Technology, Pasadena, CA 91125, USA. Beckman Institute and Molecular Materials Research Center, California Institute of Technology, Pasadena, CA 91125, USA. Kavli Nanoscience Institute, California Institute of Technology, Pasadena, CA 91125, USA. nslewis@caltech.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24876492" target="_blank"〉PubMed〈/a〉
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