Institution
University of York
Education•York, York, United Kingdom•
About: University of York is a education organization based out in York, York, United Kingdom. It is known for research contribution in the topics: Population & Health care. The organization has 22089 authors who have published 56925 publications receiving 2458285 citations. The organization is also known as: York University & Ebor..
Topics: Population, Health care, Context (language use), Randomized controlled trial, Cost effectiveness
Papers published on a yearly basis
Papers
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TL;DR: The paper describes the arrangement of the atoms within rhombohedral crystals of 2Zn pig insulin as seen in electron density maps calculated from X-ray data extending to 1.5 A at room temperature and refined to R = 0.153, finding all but eight of the active atoms in the protein form at least one hydrogen bond.
Abstract: The paper describes the arrangement of the atoms within rhombohedral crystals of 2Zn pig insulin as seen in electron density maps calculated from X-ray data extending to 1.5 A (1 A = 10(-10) m = 10(-1) nm) at room temperature and refined to R = 0.153. The unit cell contains 2 zinc ions, 6 insulin molecules and about 3 x 283 water molecules. The atoms in the protein molecules appear well defined, 7 of the 102 side chains in the asymmetric unit have been assigned alternative disordered positions. The electron density over the water molecules has been interpreted in terms of 349 sites, 217 weighted 1.0, 126 weighted 0.5, 5 at 0.33 and 1 at 0.25 giving ca. 282 molecules. The positions and contacts of all the residues belonging to the two A and B chains of the asymmetric unit are shown first and then details of their arrangement in the two insulin molecules, 1 and 2, which are different. The formation from these molecules of a compact dimer and the further aggregation of three dimers to form a hexamer around two zinc ions, follows. It appears that in the packing of the hexamers in the crystal there are conflicting influences; too-close contacts between histidine B5 residues in neighbouring hexamers are probably responsible for movements of atoms at the beginning of the A chain of one of the two molecules of the dimer that initiate movements in other parts, particularly near the end of the B chain. At every stage of the building of the protein structure, residues to chains of definite conformation, molecules, dimers, hexamers and crystals, we can trace the effect of the packing of like groups to like, aliphatic groups together, aromatic groups together, hydrogen-bonded structures, positive and negative ions. Between the protein molecules, the water is distributed in cavities and channels that are continuous throughout the crystals. More than half the water molecules appear directly hydrogen bonded to protein atoms. These are generally in contact with other water molecules in chains and rings of increasing disorder, corresponding with their movement through the crystals. Within the established crystal structure we survey next the distribution of hydrogen bonds within the protein molecules and between water and protein and water and water; all but eight of the active atoms in the protein form at least one hydrogen bond.(ABSTRACT TRUNCATED AT 400 WORDS)
583 citations
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University of Copenhagen1, University of Utah2, Smithsonian Tropical Research Institute3, Rafael Advanced Defense Systems4, University of California, Berkeley5, University of Sydney6, Texas A&M University7, Missouri State University8, Uppsala University9, Spanish National Research Council10, University of California, Los Angeles11, University of Alberta12, Mount Holyoke College13, University of Leeds14, University of Bristol15, Russian Academy of Sciences16, University of Oregon17, Moscow State University18, China University of Geosciences (Wuhan)19, University of Kansas20, National Park Service21, American Museum of Natural History22, Aarhus University23, Regierungspräsidium Stuttgart24, University of Kiel25, University of Oslo26, University of Adelaide27, University of York28, Pennsylvania State University29
TL;DR: It is shown that climate has been a major driver of population change over the past 50,000 years, however, each species responds differently to the effects of climatic shifts, habitat redistribution and human encroachment.
Abstract: Despite decades of research, the roles of climate and humans in driving the dramatic extinctions of large-bodied mammals during the Late Quaternary period remain contentious. Here we use ancient DNA, species distribution models and the human fossil record to elucidate how climate and humans shaped the demographic history of woolly rhinoceros, woolly mammoth, wild horse, reindeer, bison and musk ox. We show that climate has been a major driver of population change over the past 50,000 years. However, each species responds differently to the effects of climatic shifts, habitat redistribution and human encroachment. Although climate change alone can explain the extinction of some species, such as Eurasian musk ox and woolly rhinoceros, a combination of climatic and anthropogenic effects appears to be responsible for the extinction of others, including Eurasian steppe bison and wild horse. We find no genetic signature or any distinctive range dynamics distinguishing extinct from surviving species, emphasizing the challenges associated with predicting future responses of extant mammals to climate and human-mediated habitat change.
582 citations
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TL;DR: The way multispecies food webs respond to the harvesting of species at differrent trophic levels is discussed, and biological and economic insights are applied to a discussion of fisheries in the Southern Otean and the North Sea and to enunciate some for harvesting in mult ispecies systems.
Abstract: With the overexploitation of many conventional fish stcocks, and growing interest in harvesting new kinds of food from the sea, there is increasing need for managers of fisheries to take account of interactions among species. In particular, as Antarctic krill-fishing industries grow, there is a need to agree upon sound principles for managing the Southern Ocean ecosystem. Using simple models, we discuss the way multispecies food webs respond to the harvesting of species at differrent trophic levels. These biological and economic insights are applied to a discussion of fisheries in the Southern Otean and the North Sea and to enunciate some for harvesting in multispecies systems.
582 citations
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TL;DR: MAX4 and RMS1 were found to encode orthologous, auxin-inducible members of the polyene dioxygenase family, suggesting that MAX4 is required to produce a mobile branch-inhibiting signal, acting downstream of auxin.
Abstract: Shoot branching is inhibited by auxin transported down the stem from the shoot apex. Auxin does not accumulate in inhibited buds and so must act indirectly. We show that mutations in the MAX4 gene of Arabidopsis result in increased and auxin-resistant bud growth. Increased branching in max4 shoots is restored to wild type by grafting to wild-type rootstocks, suggesting that MAX4 is required to produce a mobile branch-inhibiting signal, acting downstream of auxin. A similar role has been proposed for the pea gene, RMS1. Accordingly, MAX4 and RMS1 were found to encode orthologous, auxin-inducible members of the polyene dioxygenase family.
582 citations
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University College London1, International Institute for Applied Systems Analysis2, University of Reading3, University of London4, University of Sydney5, World Bank6, Cooperative Institute for Research in Environmental Sciences7, Umeå University8, Tsinghua University9, University of Geneva10, University of New England (United States)11, University of Birmingham12, Paris-Sorbonne University13, University of Washington14, Heidelberg University15, International Livestock Research Institute16, University of York17, Cayetano Heredia University18, University of Sussex19, Nelson Marlborough Institute of Technology20, University of North Texas21, Centre for Environment, Fisheries and Aquaculture Science22, University of Colorado Boulder23, University of Essex24, Iran University of Medical Sciences25, University of Exeter26, Imperial College London27, Atlantic Oceanographic and Meteorological Laboratory28
TL;DR: The Lancet Countdown tracks 41 indicators across five domains: climate change impacts, exposures, and vulnerability; adaptation, planning, and resilience for health; mitigation actions and health co-benefits; finance and economics; and public and political engagement.
582 citations
Authors
Showing all 22432 results
Name | H-index | Papers | Citations |
---|---|---|---|
Cyrus Cooper | 204 | 1869 | 206782 |
Eric R. Kandel | 184 | 603 | 113560 |
Ian J. Deary | 166 | 1795 | 114161 |
Elio Riboli | 158 | 1136 | 110499 |
Claude Bouchard | 153 | 1076 | 115307 |
Robert Plomin | 151 | 1104 | 88588 |
Kevin J. Gaston | 150 | 750 | 85635 |
John R. Hodges | 149 | 812 | 82709 |
Myrna M. Weissman | 149 | 772 | 108259 |
Jeffrey A. Lieberman | 145 | 706 | 85306 |
Howard L. Weiner | 144 | 1047 | 91424 |
Dan J. Stein | 142 | 1727 | 132718 |
Jedd D. Wolchok | 140 | 713 | 123336 |
Bernard Henrissat | 139 | 593 | 100002 |
Joseph E. LeDoux | 139 | 478 | 91500 |