Table of Contents

Biological Sciences

• Agricultural Sciences

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    Multiple lines of evidence for the origin of domesticated chili pepper, Capsicum annuum, in Mexico

    Kraig H. Kraft, Cecil H. Brown, Gary P. Nabhan, Eike Luedeling, José de Jesús Luna Ruiz, Geo Coppens d’Eeckenbrugge, Robert J. Hijmans, and Paul Gepts

    PNAS April 29, 2014 111 (17) 6165-6170; first published April 21, 2014. https://doi.org/10.1073/pnas.1308933111
  • Open Access

    Bayesian inference for an emerging arboreal epidemic in the presence of control

    Matthew Parry, Gavin J. Gibson, Stephen Parnell, Tim R. Gottwald, Michael S. Irey, Timothy C. Gast, and Christopher A. Gilligan

    PNAS April 29, 2014 111 (17) 6258-6262; first published April 7, 2014. https://doi.org/10.1073/pnas.1310997111

• Anthropology

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    Establishing the validity of domestication genes using DNA from ancient chickens

    Linus Girdland Flink, Richard Allen, Ross Barnett, Helena Malmström, Joris Peters, Jonas Eriksson, Leif Andersson, Keith Dobney, and Greger Larson

    PNAS April 29, 2014 111 (17) 6184-6189; first published April 21, 2014. https://doi.org/10.1073/pnas.1308939110

• Applied Biological Sciences

  • Open Access

    Expression and glycoengineering of functionally active heteromultimeric IgM in plants

    • From the Cover

    Andreas Loos, Clemens Gruber, Friedrich Altmann, Ulrich Mehofer, Frank Hensel, Melanie Grandits, Chris Oostenbrink, Gerhard Stadlmayr, Paul G. Furtmüller, and Herta Steinkellner

    PNAS April 29, 2014 111 (17) 6263-6268; first published March 31, 2014. https://doi.org/10.1073/pnas.1320544111

    See companion article:

    • Designed IgM from glycoengineering

      - Apr 15, 2014

• Biochemistry

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    Architecture and assembly of the archaeal Cdc48⋅20S proteasome

    Dominik Barthelme, James Z. Chen, Jonathan Grabenstatter, Tania A. Baker, and Robert T. Sauer

    PNAS April 29, 2014 111 (17) E1687-E1694; first published April 7, 2014. https://doi.org/10.1073/pnas.1404823111
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    Conserved electron donor complex Dre2–Tah18 is required for ribonucleotide reductase metallocofactor assembly and DNA synthesis

    Yan Zhang, Haoran Li, Caiguo Zhang, Xiuxiang An, Lili Liu, JoAnne Stubbe, and Mingxia Huang

    PNAS April 29, 2014 111 (17) E1695-E1704; first published April 14, 2014. https://doi.org/10.1073/pnas.1405204111
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    Selective inhibition of the function of tyrosine-phosphorylated STAT3 with a phosphorylation site-specific intrabody

    Mi Young Koo, Jiyoung Park, Jung Mi Lim, Sei Yoon Joo, Seung-Pil Shin, Hyun Bo Shim, Junho Chung, Dongmin Kang, Hyun Ae Woo, and Sue Goo Rhee

    PNAS April 29, 2014 111 (17) 6269-6274; first published April 14, 2014. https://doi.org/10.1073/pnas.1316815111
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    Molecular recognition and modification of the 30S ribosome by the aminoglycoside-resistance methyltransferase NpmA

    Jack A. Dunkle, Kellie Vinal, Pooja M. Desai, Natalia Zelinskaya, Miloje Savic, Dayne M. West, Graeme L. Conn, and Christine M. Dunham

    PNAS April 29, 2014 111 (17) 6275-6280; first published April 9, 2014. https://doi.org/10.1073/pnas.1402789111
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    Structure of the Toll-Spätzle complex, a molecular hub in Drosophila development and innate immunity

    Christoph Parthier, Marco Stelter, Christian Ursel, Uwe Fandrich, Hauke Lilie, Constanze Breithaupt, and Milton T. Stubbs

    PNAS April 29, 2014 111 (17) 6281-6286; first published April 14, 2014. https://doi.org/10.1073/pnas.1320678111
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    Discovery of LPMO activity on hemicelluloses shows the importance of oxidative processes in plant cell wall degradation

    Jane W. Agger, Trine Isaksen, Anikó Várnai, Silvia Vidal-Melgosa, William G. T. Willats, Roland Ludwig, Svein J. Horn, Vincent G. H. Eijsink, and Bjørge Westereng

    PNAS April 29, 2014 111 (17) 6287-6292; first published April 14, 2014. https://doi.org/10.1073/pnas.1323629111

• Biophysics and Computational Biology

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    Measurement of histidine pK_a values and tautomer populations in invisible protein states

    Alexandar L. Hansen and Lewis E. Kay

    PNAS April 29, 2014 111 (17) E1705-E1712; first published April 14, 2014. https://doi.org/10.1073/pnas.1400577111
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    Initial steps of inactivation at the K⁺ channel selectivity filter

    Andrew S. Thomson, Florian T. Heer, Frank J. Smith, Eunan Hendron, Simon Bernèche, and Brad S. Rothberg

    PNAS April 29, 2014 111 (17) E1713-E1722; first published April 14, 2014. https://doi.org/10.1073/pnas.1317573111
  • Open Access

    Training-free atomistic prediction of nucleosome occupancy

    Peter Minary and Michael Levitt

    PNAS April 29, 2014 111 (17) 6293-6298; first published April 14, 2014. https://doi.org/10.1073/pnas.1404475111
  • Open Access

    Mobile hydrogen carbonate acts as proton acceptor in photosynthetic water oxidation

    Sergey Koroidov, Dmitriy Shevela, Tatiana Shutova, Göran Samuelsson, and Johannes Messinger

    PNAS April 29, 2014 111 (17) 6299-6304; first published April 7, 2014. https://doi.org/10.1073/pnas.1323277111
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    X-ray structure of human aquaporin 2 and its implications for nephrogenic diabetes insipidus and trafficking

    Anna Frick, Urszula Kosinska Eriksson, Fabrizio de Mattia, Fredrik Öberg, Kristina Hedfalk, Richard Neutze, Willem J. de Grip, Peter M. T. Deen, and Susanna Törnroth-Horsefield

    PNAS April 29, 2014 111 (17) 6305-6310; first published April 14, 2014. https://doi.org/10.1073/pnas.1321406111
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    Tau mutants bind tubulin heterodimers with enhanced affinity

    Shana Elbaum-Garfinkle, Garrett Cobb, Jocelyn T. Compton, Xiao-Han Li, and Elizabeth Rhoades

    PNAS April 29, 2014 111 (17) 6311-6316; first published April 14, 2014. https://doi.org/10.1073/pnas.1315983111

• Cell Biology

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    Generation of multiciliated cells in functional airway epithelia from human induced pluripotent stem cells

    Amy L. Firth, Carl T. Dargitz, Susan J. Qualls, Tushar Menon, Rebecca Wright, Oded Singer, Fred H. Gage, Ajai Khanna, and Inder M. Verma

    PNAS April 29, 2014 111 (17) E1723-E1730; first published March 24, 2014. https://doi.org/10.1073/pnas.1403470111

    See companion article:

    • Making proximal airway epithelium from stem cells

      - Apr 16, 2014
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    Cellular heterogeneity profiling by hyaluronan probes reveals an invasive but slow-growing breast tumor subset

    Mandana Veiseh, Daniel H. Kwon, Alexander D. Borowsky, Cornelia Tolg, Hon S. Leong, John D. Lewis, Eva A. Turley, and Mina J. Bissell

    PNAS April 29, 2014 111 (17) E1731-E1739; first published April 14, 2014. https://doi.org/10.1073/pnas.1402383111
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    Sea star tenacity mediated by a protein that fragments, then aggregates

    Elise Hennebert, Ruddy Wattiez, Mélanie Demeuldre, Peter Ladurner, Dong Soo Hwang, J. Herbert Waite, and Patrick Flammang

    PNAS April 29, 2014 111 (17) 6317-6322; first published April 14, 2014. https://doi.org/10.1073/pnas.1400089111
  • Open Access

    Tumor microenvironment-based feed-forward regulation of NOS2 in breast cancer progression

    Julie L. Heinecke, Lisa A. Ridnour, Robert Y. S. Cheng, Christopher H. Switzer, Michael M. Lizardo, Chand Khanna, Sharon A. Glynn, S. Perwez Hussain, Howard A. Young, Stefan Ambs, and David A. Wink

    PNAS April 29, 2014 111 (17) 6323-6328; first published April 14, 2014. https://doi.org/10.1073/pnas.1401799111

• Developmental Biology

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    Brf1 posttranscriptionally regulates pluripotency and differentiation responses downstream of Erk MAP kinase

    Frederick E. Tan and Michael B. Elowitz

    PNAS April 29, 2014 111 (17) E1740-E1748; first published April 14, 2014. https://doi.org/10.1073/pnas.1320873111
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    Sp8 regulates inner ear development

    Hyeyoung A. Chung, Sofia Medina-Ruiz, and Richard M. Harland

    PNAS April 29, 2014 111 (17) 6329-6334; first published April 10, 2014. https://doi.org/10.1073/pnas.1319301111
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    MicroRNAs are critical regulators of tuberous sclerosis complex and mTORC1 activity in the size control of the Xenopus kidney

    Daniel Romaker, Vikash Kumar, Débora M. Cerqueira, Ryan M. Cox, and Oliver Wessely

    PNAS April 29, 2014 111 (17) 6335-6340; first published April 14, 2014. https://doi.org/10.1073/pnas.1320577111

• Ecology

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    Endemism and functional convergence across the North American soil mycobiome

    Jennifer M. Talbot, Thomas D. Bruns, John W. Taylor, Dylan P. Smith, Sara Branco, Sydney I. Glassman, Sonya Erlandson, Rytas Vilgalys, Hui-Ling Liao, Matthew E. Smith, and Kabir G. Peay

    PNAS April 29, 2014 111 (17) 6341-6346; first published April 14, 2014. https://doi.org/10.1073/pnas.1402584111

• Environmental Sciences

  • Open Access

    Abrupt increases in Amazonian tree mortality due to drought–fire interactions

    Paulo Monteiro Brando, Jennifer K. Balch, Daniel C. Nepstad, Douglas C. Morton, Francis E. Putz, Michael T. Coe, Divino Silvério, Marcia N. Macedo, Eric A. Davidson, Caroline C. Nóbrega, Ane Alencar, and Britaldo S. Soares-Filho

    PNAS April 29, 2014 111 (17) 6347-6352; first published April 14, 2014. https://doi.org/10.1073/pnas.1305499111

• Evolution

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    Storytelling and story testing in domestication

    Pascale Gerbault, Robin G. Allaby, Nicole Boivin, Anna Rudzinski, Ilaria M. Grimaldi, J. Chris Pires, Cynthia Climer Vigueira, Keith Dobney, Kristen J. Gremillion, Loukas Barton, Manuel Arroyo-Kalin, Michael D. Purugganan, Rafael Rubio de Casas, Ruth Bollongino, Joachim Burger, Dorian Q. Fuller, Daniel G. Bradley, David J. Balding, Peter J. Richerson, M. Thomas P. Gilbert, Greger Larson, and Mark G. Thomas

    PNAS April 29, 2014 111 (17) 6159-6164; first published April 21, 2014. https://doi.org/10.1073/pnas.1400425111
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    Beyond the single gene: How epistasis and gene-by-environment effects influence crop domestication

    Andrew N. Doust, Lewis Lukens, Kenneth M. Olsen, Margarita Mauro-Herrera, Ann Meyer, and Kimberly Rogers

    PNAS April 29, 2014 111 (17) 6178-6183; first published April 21, 2014. https://doi.org/10.1073/pnas.1308940110
  • Open Access

    Enhanced evolution by stochastically variable modification of epigenetic marks in the early embryo

    Sergio Branciamore, Andrei S. Rodin, Arthur D. Riggs, and Sergei N. Rodin

    PNAS April 29, 2014 111 (17) 6353-6358; first published April 14, 2014. https://doi.org/10.1073/pnas.1402585111
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    Partner choice and fidelity stabilize coevolution in a Cretaceous-age defensive symbiosis

    Martin Kaltenpoth, Kerstin Roeser-Mueller, Sabrina Koehler, Ashley Peterson, Taras Y. Nechitaylo, J. William Stubblefield, Gudrun Herzner, Jon Seger, and Erhard Strohm

    PNAS April 29, 2014 111 (17) 6359-6364; first published April 14, 2014. https://doi.org/10.1073/pnas.1400457111

• Genetics

  • Open Access

    Methylation protects microRNAs from an AGO1-associated activity that uridylates 5′ RNA fragments generated by AGO1 cleavage

    Guodong Ren, Meng Xie, Shuxin Zhang, Carissa Vinovskis, Xuemei Chen, and Bin Yu

    PNAS April 29, 2014 111 (17) 6365-6370; first published April 14, 2014. https://doi.org/10.1073/pnas.1405083111

• Immunology

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    Optogenetic control of chemokine receptor signal and T-cell migration

    Yuexin Xu, Young-Min Hyun, Kihong Lim, Hyunwook Lee, Ryan J. Cummings, Scott A. Gerber, Seyeon Bae, Thomas Yoonsang Cho, Edith M. Lord, and Minsoo Kim

    PNAS April 29, 2014 111 (17) 6371-6376; first published April 14, 2014. https://doi.org/10.1073/pnas.1319296111
  • Open Access

    Stretched cell cycle model for proliferating lymphocytes

    Mark R. Dowling, Andrey Kan, Susanne Heinzel, Jie H. S. Zhou, Julia M. Marchingo, Cameron J. Wellard, John F. Markham, and Philip D. Hodgkin

    PNAS April 29, 2014 111 (17) 6377-6382; first published April 14, 2014. https://doi.org/10.1073/pnas.1322420111

• Medical Sciences

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    Humoral response to a viral glycan correlates with survival on PROSTVAC-VF

    Christopher T. Campbell, James L. Gulley, Oyindasola Oyelaran, James W. Hodge, Jeffrey Schlom, and Jeffrey C. Gildersleeve

    PNAS April 29, 2014 111 (17) E1749-E1758; first published April 14, 2014. https://doi.org/10.1073/pnas.1314722111
  • Open Access

    PDGFRβ reverses EphB4 signaling in alveolar rhabdomyosarcoma

    M. Imran Aslam, Jinu Abraham, Atiya Mansoor, Brian J. Druker, Jeffrey W. Tyner, and Charles Keller

    PNAS April 29, 2014 111 (17) 6383-6388; first published April 14, 2014. https://doi.org/10.1073/pnas.1403608111
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    Essential role for TrpC5-containing extracellular vesicles in breast cancer with chemotherapeutic resistance

    Xin Ma, Zhen Chen, Dong Hua, Dongxu He, Linjun Wang, Peng Zhang, Junqi Wang, Yanfei Cai, Caiji Gao, Xiaodong Zhang, Fangfang Zhang, Teng Wang, Tingting Hong, Linfang Jin, Xiaowei Qi, Shuxian Chen, Xiaoting Gu, Dangtong Yang, Qiongxi Pan, Yifei Zhu, Yun Chen, Daozhen Chen, Liwen Jiang, Xiaofeng Han, Yanyun Zhang, Jian Jin, and Xiaoqiang Yao

    PNAS April 29, 2014 111 (17) 6389-6394; first published April 14, 2014. https://doi.org/10.1073/pnas.1400272111
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    PI3K isoform dependence of PTEN-deficient tumors can be altered by the genetic context

    Fabienne Schmit, Tamara Utermark, Sen Zhang, Qi Wang, Thanh Von, Thomas M. Roberts, and Jean J. Zhao

    PNAS April 29, 2014 111 (17) 6395-6400; first published April 15, 2014. https://doi.org/10.1073/pnas.1323004111

• Microbiology

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    Diverse mutational pathways converge on saturable chloroquine transport via the malaria parasite’s chloroquine resistance transporter

    Robert L. Summers, Anurag Dave, Tegan J. Dolstra, Sebastiano Bellanca, Rosa V. Marchetti, Megan N. Nash, Sashika N. Richards, Valerie Goh, Robyn L. Schenk, Wilfred D. Stein, Kiaran Kirk, Cecilia P. Sanchez, Michael Lanzer, and Rowena E. Martin

    PNAS April 29, 2014 111 (17) E1759-E1767; first published April 11, 2014. https://doi.org/10.1073/pnas.1322965111
  • Open Access

    Evolutionary pathway to increased virulence and epidemic group A Streptococcus disease derived from 3,615 genome sequences

    Waleed Nasser, Stephen B. Beres, Randall J. Olsen, Melissa A. Dean, Kelsey A. Rice, S. Wesley Long, Karl G. Kristinsson, Magnus Gottfredsson, Jaana Vuopio, Kati Raisanen, Dominique A. Caugant, Martin Steinbakk, Donald E. Low, Allison McGeer, Jessica Darenberg, Birgitta Henriques-Normark, Chris A. Van Beneden, Steen Hoffmann, and James M. Musser

    PNAS April 29, 2014 111 (17) E1768-E1776; first published April 14, 2014. https://doi.org/10.1073/pnas.1403138111
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    Prevention of influenza by targeting host receptors using engineered proteins

    Helen Connaris, Elena A. Govorkova, Yvonne Ligertwood, Bernadette M. Dutia, Lei Yang, Sandra Tauber, Margaret A. Taylor, Nadiawati Alias, Robert Hagan, Anthony A. Nash, Robert G. Webster, and Garry L. Taylor

    PNAS April 29, 2014 111 (17) 6401-6406; first published April 14, 2014. https://doi.org/10.1073/pnas.1404205111
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    Lipopolysaccharide O antigen size distribution is determined by a chain extension complex of variable stoichiometry in Escherichia coli O9a

    Jerry D. King, Scott Berry, Bradley R. Clarke, Richard J. Morris, and Chris Whitfield

    PNAS April 29, 2014 111 (17) 6407-6412; first published April 14, 2014. https://doi.org/10.1073/pnas.1400814111
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    Hepatitis C virus triggers mitochondrial fission and attenuates apoptosis to promote viral persistence

    Seong-Jun Kim, Gulam H. Syed, Mohsin Khan, Wei-Wei Chiu, Muhammad A. Sohail, Robert G. Gish, and Aleem Siddiqui

    PNAS April 29, 2014 111 (17) 6413-6418; first published April 14, 2014. https://doi.org/10.1073/pnas.1321114111
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    Incomplete Wood–Ljungdahl pathway facilitates one-carbon metabolism in organohalide-respiring Dehalococcoides mccartyi

    Wei-Qin Zhuang, Shan Yi, Markus Bill, Vanessa L. Brisson, Xueyang Feng, Yujie Men, Mark E. Conrad, Yinjie J. Tang, and Lisa Alvarez-Cohen

    PNAS April 29, 2014 111 (17) 6419-6424; first published April 14, 2014. https://doi.org/10.1073/pnas.1321542111
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    Tetherin antagonism by Vpu protects HIV-infected cells from antibody-dependent cell-mediated cytotoxicity

    Juan F. Arias, Lisa N. Heyer, Benjamin von Bredow, Kim L. Weisgrau, Brian Moldt, Dennis R. Burton, Eva G. Rakasz, and David T. Evans

    PNAS April 29, 2014 111 (17) 6425-6430; first published April 14, 2014. https://doi.org/10.1073/pnas.1321507111
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    LRP1 is a receptor for Clostridium perfringens TpeL toxin indicating a two-receptor model of clostridial glycosylating toxins

    Björn Schorch, Shuo Song, Ferdy R. van Diemen, Hans H. Bock, Petra May, Joachim Herz, Thijn R. Brummelkamp, Panagiotis Papatheodorou, and Klaus Aktories

    PNAS April 29, 2014 111 (17) 6431-6436; first published April 15, 2014. https://doi.org/10.1073/pnas.1323790111
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    Avirulent strains of Toxoplasma gondii infect macrophages by active invasion from the phagosome

    Yanlin Zhao, Andrew H. Marple, David J. P. Ferguson, David J. Bzik, and George S. Yap

    PNAS April 29, 2014 111 (17) 6437-6442; first published April 14, 2014. https://doi.org/10.1073/pnas.1316841111

• Neuroscience

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    Transformation of the cerebellum into more ventral brainstem fates causes cerebellar agenesis in the absence of Ptf1a function

    Kathleen J. Millen, Ekaterina Y. Steshina, Igor Y. Iskusnykh, and Victor V. Chizhikov

    PNAS April 29, 2014 111 (17) E1777-E1786; first published April 14, 2014. https://doi.org/10.1073/pnas.1315024111
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    Homeostasis of functional maps in active dendrites emerges in the absence of individual channelostasis

    Rahul Kumar Rathour and Rishikesh Narayanan

    PNAS April 29, 2014 111 (17) E1787-E1796; first published April 7, 2014. https://doi.org/10.1073/pnas.1316599111
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    Thalamocortical rhythms during a vibrotactile detection task

    Saskia Haegens, Yuriria Vázquez, Antonio Zainos, Manuel Alvarez, Ole Jensen, and Ranulfo Romo

    PNAS April 29, 2014 111 (17) E1797-E1805; first published April 14, 2014. https://doi.org/10.1073/pnas.1405516111
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    Far transfer to language and math of a short software-based gaming intervention

    Andrea Paula Goldin, María Julia Hermida, Diego E. Shalom, Martín Elias Costa, Matías Lopez-Rosenfeld, María Soledad Segretin, Diego Fernández-Slezak, Sebastián J. Lipina, and Mariano Sigman

    PNAS April 29, 2014 111 (17) 6443-6448; first published April 7, 2014. https://doi.org/10.1073/pnas.1320217111
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    Defining modulatory inputs into CNS neuronal subclasses by functional pharmacological profiling

    Shrinivasan Raghuraman, Alfredo J. Garcia, Tatiana M. Anderson, Vernon D. Twede, Kigen J. Curtice, Kevin Chase, Jan-Marino Ramirez, Baldomero M. Olivera, and Russell W. Teichert

    PNAS April 29, 2014 111 (17) 6449-6454; first published April 14, 2014. https://doi.org/10.1073/pnas.1404421111
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    Aversive behavior induced by optogenetic inactivation of ventral tegmental area dopamine neurons is mediated by dopamine D2 receptors in the nucleus accumbens

    Teruko Danjo, Kenji Yoshimi, Kazuo Funabiki, Satoshi Yawata, and Shigetada Nakanishi

    PNAS April 29, 2014 111 (17) 6455-6460; first published April 15, 2014. https://doi.org/10.1073/pnas.1404323111
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    PAKs inhibitors ameliorate schizophrenia-associated dendritic spine deterioration in vitro and in vivo during late adolescence

    Akiko Hayashi-Takagi, Yoichi Araki, Mayumi Nakamura, Benedikt Vollrath, Sergio G. Duron, Zhen Yan, Haruo Kasai, Richard L. Huganir, David A. Campbell, and Akira Sawa

    PNAS April 29, 2014 111 (17) 6461-6466; first published April 3, 2014. https://doi.org/10.1073/pnas.1321109111
  • Open Access

    Simultaneous selection by object-based attention in visual and frontal cortex

    Arezoo Pooresmaeili, Jasper Poort, and Pieter R. Roelfsema

    PNAS April 29, 2014 111 (17) 6467-6472; first published April 7, 2014. https://doi.org/10.1073/pnas.1316181111
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    Regional cerebral metabolic patterns demonstrate the role of anterior forebrain mesocircuit dysfunction in the severely injured brain

    Esteban A. Fridman, Bradley J. Beattie, Allegra Broft, Steven Laureys, and Nicholas D. Schiff

    PNAS April 29, 2014 111 (17) 6473-6478; first published April 14, 2014. https://doi.org/10.1073/pnas.1320969111
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    Gq/5-HT_2c receptor signals activate a local GABAergic inhibitory feedback circuit to modulate serotonergic firing and anxiety in mice

    Katharina Spoida, Olivia A. Masseck, Evan S. Deneris, and Stefan Herlitze

    PNAS April 29, 2014 111 (17) 6479-6484; first published April 14, 2014. https://doi.org/10.1073/pnas.1321576111

• Physiology

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    Secretion of von Willebrand factor by endothelial cells links sodium to hypercoagulability and thrombosis

    Natalia I. Dmitrieva and Maurice B. Burg

    PNAS April 29, 2014 111 (17) 6485-6490; first published April 14, 2014. https://doi.org/10.1073/pnas.1404809111
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    Stoichiometry and specific assembly of Best ion channels

    Shashank Bharill, Zhu Fu, Raz Palty, and Ehud Y. Isacoff

    PNAS April 29, 2014 111 (17) 6491-6496; first published April 18, 2014. https://doi.org/10.1073/pnas.1400248111

• Plant Biology

  • Open Access

    Control of vacuolar dynamics and regulation of stomatal aperture by tonoplast potassium uptake

    Zaida Andrés, Javier Pérez-Hormaeche, Eduardo O. Leidi, Kathrin Schlücking, Leonie Steinhorst, Deirdre H. McLachlan, Karin Schumacher, Alistair M. Hetherington, Jörg Kudla, Beatriz Cubero, and José M. Pardo

    PNAS April 29, 2014 111 (17) E1806-E1814; first published April 14, 2014. https://doi.org/10.1073/pnas.1320421111
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    Convergent evolution and parallelism in plant domestication revealed by an expanding archaeological record

    Dorian Q Fuller, Tim Denham, Manuel Arroyo-Kalin, Leilani Lucas, Chris J. Stevens, Ling Qin, Robin G. Allaby, and Michael D. Purugganan

    PNAS April 29, 2014 111 (17) 6147-6152; first published April 21, 2014. https://doi.org/10.1073/pnas.1308937110
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    Salt stress-induced Ca²⁺ waves are associated with rapid, long-distance root-to-shoot signaling in plants

    • From the Cover

    Won-Gyu Choi, Masatsugu Toyota, Su-Hwa Kim, Richard Hilleary, and Simon Gilroy

    PNAS April 29, 2014 111 (17) 6497-6502; first published March 24, 2014. https://doi.org/10.1073/pnas.1319955111

    See companion article:

    • Plants pass the salt via calcium waves

      - Apr 15, 2014
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    Natural variation underlies alterations in Nramp aluminum transporter (NRAT1) expression and function that play a key role in rice aluminum tolerance

    Jian-Yong Li, Jiping Liu, Dekun Dong, Xiaomin Jia, Susan R. McCouch, and Leon V. Kochian

    PNAS April 29, 2014 111 (17) 6503-6508; first published April 11, 2014. https://doi.org/10.1073/pnas.1318975111
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    Structural basis for regulation of rhizobial nodulation and symbiosis gene expression by the regulatory protein NolR

    Soon Goo Lee, Hari B. Krishnan, and Joseph M. Jez

    PNAS April 29, 2014 111 (17) 6509-6514; first published April 14, 2014. https://doi.org/10.1073/pnas.1402243111
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    Light intensity modulates the regulatory network of the shade avoidance response in Arabidopsis

    Micha Hersch, Séverine Lorrain, Mieke de Wit, Martine Trevisan, Karin Ljung, Sven Bergmann, and Christian Fankhauser

    PNAS April 29, 2014 111 (17) 6515-6520; first published April 14, 2014. https://doi.org/10.1073/pnas.1320355111

• Sustainability Science

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    Implementing the optimal provision of ecosystem services

    Stephen Polasky, David J. Lewis, Andrew J. Plantinga, and Erik Nelson

    PNAS April 29, 2014 111 (17) 6248-6253; first published April 10, 2014. https://doi.org/10.1073/pnas.1404484111

• Systems Biology

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    Glioblastoma cellular architectures are predicted through the characterization of two-cell interactions

    Nataly Kravchenko-Balasha, Jun Wang, Francoise Remacle, R. D. Levine, and James R. Heath

    PNAS April 29, 2014 111 (17) 6521-6526; first published April 14, 2014. https://doi.org/10.1073/pnas.1404462111