6630期

最新文章

• Complex scaffold remodeling in plant triterpene biosynthesis AI翻译
  作者：Pena, Ricardo De La; Hodgson, Hannah; Liu, Jack Chun -Ting; Stephenson, Michael J.; Martin, Azahara C.; Owen, Charlotte; Harkess, Alex; Leebens-Mack, Jim; Jimenez, Luis E.; Osbourn, Anne; Sattely, Elizabeth S.
  作者单位：Stanford University; UK Research & Innovation (UKRI); Biotechnology and Biological Sciences Research Council (BBSRC); John Innes Center; Stanford University; University of East Anglia; UK Research & Innovation (UKRI); Biotechnology and Biological Sciences Research Council (BBSRC); John Innes Center; HudsonAlpha Institute for Biotechnology; University System of Georgia; University of Georgia; Howard Hughes Medical Institute; Stanford University
  摘要：Triterpenes with complex scaffold modifications are widespread in the plant kingdom. Limonoids are an exemplary family that are responsible for the bitter taste in citrus (e.g., limonin) and the active constituents of neem oil, a widely used bioinsecticide (e.g., azadirachtin). Despite the commercial value of limonoids, a complete biosynthetic route has not been described. We report the discovery of 22 enzymes, including a pair of neofunctionalized sterol isomerases, that catalyze 12 distinct ...
• The drivers and impacts of Amazon forest degradation AI翻译
  作者：Lapola, David M.; Pinho, Patricia; Barlow, Jos; Aragao, Luiz E. O. C.; Berenguer, Erika; Carmenta, Rachel; Liddy, Hannah M.; Seixas, Hugo; Silva, Camila V. J.; Silva-Junior, Celso H. L.; Alencar, Ane A. C.; Anderson, Liana O.; Armenteras, Dolors; Brovkin, Victor; Calders, Kim; Chambers, Jeffrey; Chini, Louise; Costa, Marcos H.; Faria, Bruno L.; Fearnside, Philip M.; Ferreira, Joice; Gatti, Luciana; Gutierrez-Velez, Victor Hugo; Han, Zhangang; Hibbard, Kathleen; Koven, Charles; Lawrence, Peter; Pongratz, Julia; Portela, Bruno T. T.; Rounsevell, Mark; Ruane, Alex C.; Schaldach, Rudiger; da Silva, Sonaira S.; von Randow, Celso; Walker, Wayne S.
  作者单位：Universidade Estadual de Campinas; Lancaster University; Instituto Nacional de Pesquisas Espaciais (INPE); University of Exeter; University of Oxford; University of East Anglia; Columbia University; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; Goddard Institute for Space Studies; University of California System; University of California Los Angeles; California Institute of Technology; National Aeronautics & Space Administration (NASA); NASA Jet Propulsion Laboratory (JPL); Universidade Federal do Maranhao; Universidad Nacional de Colombia; Max Planck Society; Ghent University; University of Eastern Finland; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; University System of Maryland; University of Maryland College Park; Universidade Federal de Vicosa; Instituto Federal do Norte de Minas Gerais (IFNMG); Institute Nacional de Pesquisas da Amazonia; Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA); Pennsylvania Commonwealth System of Higher Education (PCSHE); Temple University; Beijing Normal University; National Aeronautics & Space Administration (NASA); National Center Atmospheric Research (NCAR) - USA; University of Munich; Helmholtz Association; Karlsruhe Institute of Technology; University of Edinburgh; Universitat Kassel
• Neurons share an intense load Time-of-day-detecting cells in the eye give customized responses to light intensity AI翻译
  作者：Martin, Paul R.
  作者单位：University of Sydney
• Meteorite results bode well for exo-Earths Water and light elements are likely available right where rocky planets take shape AI翻译
  作者：Voosen, Paul
• Earth's persistent thermostat The dependence of rock weathering on temperature helps to steer Earth's climate AI翻译
  作者：Hilton, Robert G.
  作者单位：University of Oxford
• Can California's floods help recharge depleted aquifers? Plans to drown orchards and farm fields to boost groundwater supplies get off to a slow start AI翻译
  作者：Charles, Dan
• Farm animal welfare: Beyond natural behavior AI翻译
  作者：Dawkins, Marian Stamp
  作者单位：University of Oxford
• READY, SET, SHARE! As funders roll out new requirements for making data freely available, researchers weigh costs and benefits AI翻译
  作者：Kaiser, Jocelyn; Brainard, Jeffrey
• Nucleosynthetic isotope anomalies of zinc in meteorites constrain the origin of Earth?s volatiles AI翻译
  作者：Martins, Rayssa; Kuthning, Sven; Coles, Barry J.; Kreissig, Katharina; Rehkamper, Mark
  作者单位：Imperial College London; Shimadzu Corporation
  摘要：Material inherited from different nucleosynthesis sources imparts distinct isotopic signatures to meteorites and terrestrial planets. These nucleosynthetic isotope anomalies have been used to constrain the origins of material that formed Earth. However, anomalies have only been identified for elements with high condensation temperatures, leaving the origin of Earth's volatile elements unconstrained. We determined the isotope composition of the moderately volatile element zinc in 18 bulk meteor...
• Low protease activity in B cell follicles promotes retention of intact antigens after immunization AI翻译
  作者：Aung, Aereas; Cui, Ang; Maiorino, Laura; Amini, Ava P.; Gregory, Justin R.; Bukenya, Maurice; Zhang, Yiming; Lee, Heya; Cottrell, Christopher A.; Morgan, Duncan M.; Silva, Murillo; Suh, Heikyung; Kirkpatrick, Jesse D.; Amlashi, Parastoo; Remba, Tanaka; Froehle, Leah M.; Xiao, Shuhao; Abraham, Wuhbet; Adams, Josetta; Love, J. Christopher; Huyett, Phillip; Kwon, Douglas S.; Hacohen, Nir; Schief, William R.; Bhatia, Sangeeta N.; Irvine, Darrell J.
  作者单位：Harvard University; Massachusetts Institute of Technology (MIT); Broad Institute; Massachusetts Institute of Technology (MIT); Harvard University; Harvard University; Microsoft; Massachusetts Institute of Technology (MIT); Scripps Research Institute; Scripps Research Institute; Massachusetts Institute of Technology (MIT); Harvard University; Massachusetts Institute of Technology (MIT); Ragon Institute; Harvard University; Harvard University; Harvard Medical School; Harvard University; Harvard University Medical Affiliates; Massachusetts Eye & Ear Infirmary; Harvard University; Harvard University Medical Affiliates; Massachusetts General Hospital; Scripps Research Institute; Scripps Research Institute; International AIDS Vaccine Initiative; Massachusetts Institute of Technology (MIT); Harvard University; Harvard Medical School; Harvard University Medical Affiliates; Brigham & Women's Hospital; Howard Hughes Medical Institute; Massachusetts Institute of Technology (MIT); Duke University