Proceedings of the National Academy of Sciences: 106 (1)

New Research In

January 06, 2009; vol. 106 no. 1

This Week in PNAS

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In This Issue
PNAS January 6, 2009 106 (1) 1-2; https://doi.org/10.1073/iti0109106
See companion article:
Whole-genome association study identifies STK39 as a hypertension susceptibility gene
- Jan 06, 2009

Efficient colonic mucosal wound repair requires Trem2 signaling
- Jan 06, 2009

Glyconanoparticles allow pre-symptomatic in vivo imaging of brain disease
- Jan 06, 2009

De novo generation of a transmissible spongiform encephalopathy by mouse transgenesis
- Jan 06, 2009

Targeting Nrf2 with the triterpenoid CDDO- imidazolide attenuates cigarette smoke-induced emphysema and cardiac dysfunction in mice
- Jan 06, 2009

Letters (Online Only)

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Vitamin B deficiency causes neural cell loss and cognitive impairment in the developing rat
Jean-Luc Daval, Sébastien Blaise, and Jean-Louis Guéant

PNAS January 6, 2009 106 (1) E1; https://doi.org/10.1073/pnas.0809217106
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Reply to Daval et al.: How comparable are brain changes induced by dietary methyl-donor deficiency occurring before birth or after weaning?
- Jan 06, 2009
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Reply to Daval et al.: How comparable are brain changes induced by dietary methyl-donor deficiency occurring before birth or after weaning?
Aron M. Troen and Irwin H. Rosenberg

PNAS January 6, 2009 106 (1) E2; https://doi.org/10.1073/pnas.0811541106
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Vitamin B deficiency causes neural cell loss and cognitive impairment in the developing rat
- Jan 06, 2009
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Coastal eutrophication: Whether N and/or P should be abated depends on the dynamic mass balance
Andreas C. Bryhn and Lars Håkanson

PNAS January 6, 2009 106 (1) E3; https://doi.org/10.1073/pnas.0810905106
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Reply to Bryhn and Håkanson: Models for the Baltic agree with our experiments and observations in lakes
- Jan 06, 2009
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Reply to Bryhn and Håkanson: Models for the Baltic agree with our experiments and observations in lakes
D. W. Schindler and R. E. Hecky

PNAS January 6, 2009 106 (1) E4; https://doi.org/10.1073/pnas.0811576106
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Coastal eutrophication: Whether N and/or P should be abated depends on the dynamic mass balance
- Jan 06, 2009
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Serum-based microRNAs: Are we blinded by potential?
David B. Jackson

PNAS January 6, 2009 106 (1) E5; https://doi.org/10.1073/pnas.0809999106

Editorial

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PNAS allows authors to keep copyright
Randy Schekman

PNAS January 6, 2009 106 (1) 3; https://doi.org/10.1073/pnas.0812539106

Commentaries

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Teaching Cre to follow directions
Gregory D. Van Duyne

PNAS January 6, 2009 106 (1) 4-5; https://doi.org/10.1073/pnas.0811624106
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A chimeric Cre recombinase with regulated directionality
- Nov 25, 2008
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Microbe hunting in the 21st century
W. Ian Lipkin

PNAS January 6, 2009 106 (1) 6-7; https://doi.org/10.1073/pnas.0811420106
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A highly prevalent and genetically diversified Picornaviridae genus in South Asian children
- Dec 23, 2008
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Can neurosphere production help restore inner ear transduction?
Maria Sol Collado and Jeffrey R. Holt

PNAS January 6, 2009 106 (1) 8-9; https://doi.org/10.1073/pnas.0811804106
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Cells of adult brain germinal zone have properties akin to hair cells and can be used to replace inner ear sensory cells after damage
- Dec 30, 2008
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Constraining the loop, releasing prion infectivity
Claudio Soto

PNAS January 6, 2009 106 (1) 10-11; https://doi.org/10.1073/pnas.0811625106
See companion article:
De novo generation of a transmissible spongiform encephalopathy by mouse transgenesis
- Jan 06, 2009

Physical Sciences

Applied Mathematics
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  Force generation by a dynamic Z-ring in Escherichia coli cell division
  Jun F. Allard and Eric N. Cytrynbaum
  
  PNAS January 6, 2009 106 (1) 145-150; https://doi.org/10.1073/pnas.0808657106
Applied Physical Sciences
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  The key role of the surface membrane in why gastropod nacre grows in towers
  Antonio G. Checa, Julyan H. E. Cartwright, and Marc-Georg Willinger
  
  PNAS January 6, 2009 106 (1) 38-43; https://doi.org/10.1073/pnas.0808796106
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  Identification of direct residue contacts in protein–protein interaction by message passing
  Martin Weigt, Robert A. White, Hendrik Szurmant, James A. Hoch, and Terence Hwa
  
  PNAS January 6, 2009 106 (1) 67-72; https://doi.org/10.1073/pnas.0805923106
Chemistry
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  Imaging the glycome
  Inaugural Article
  
  Scott T. Laughlin and Carolyn R. Bertozzi
  
  PNAS January 6, 2009 106 (1) 12-17; https://doi.org/10.1073/pnas.0811481106
  
  See companion article:
  Profile of Carolyn Bertozzi
  - Feb 16, 2010
- Open Access
  Glyconanoparticles allow pre-symptomatic in vivo imaging of brain disease
  Sander I. van Kasteren, Sandra J. Campbell, Sébastien Serres, Daniel C. Anthony, Nicola R. Sibson, and Benjamin G. Davis
  
  PNAS January 6, 2009 106 (1) 18-23; https://doi.org/10.1073/pnas.0806787106
  
  See companion article:
  In This Issue
  - Jan 06, 2009
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  Folding energy landscape and network dynamics of small globular proteins
  Naoto Hori, George Chikenji, R. Stephen Berry, and Shoji Takada
  
  PNAS January 6, 2009 106 (1) 73-78; https://doi.org/10.1073/pnas.0811560106
Engineering
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  Directed self-organization of single DNA molecules in a nanoslit via embedded nanopit arrays
  From the Cover
  
  Walter Reisner, Niels B. Larsen, Henrik Flyvbjerg, Jonas O. Tegenfeldt, and Anders Kristensen
  
  PNAS January 6, 2009 106 (1) 79-84; https://doi.org/10.1073/pnas.0811468106
Geology
- Open Access
  Two-phase increase in the maximum size of life over 3.5 billion years reflects biological innovation and environmental opportunity
  Jonathan L. Payne, Alison G. Boyer, James H. Brown, Seth Finnegan, Michał Kowalewski, Richard A. Krause Jr., S. Kathleen Lyons, Craig R. McClain, Daniel W. McShea, Philip M. Novack-Gottshall, Felisa A. Smith, Jennifer A. Stempien, and Steve C. Wang
  
  PNAS January 6, 2009 106 (1) 24-27; https://doi.org/10.1073/pnas.0806314106
- Open Access
  On the fate of anthropogenic nitrogen
  William H. Schlesinger
  
  PNAS January 6, 2009 106 (1) 203-208; https://doi.org/10.1073/pnas.0810193105
Geophysics
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  Nonlinear threshold behavior during the loss of Arctic sea ice
  I. Eisenman and J. S. Wettlaufer
  
  PNAS January 6, 2009 106 (1) 28-32; https://doi.org/10.1073/pnas.0806887106

Biological Sciences

Anthropology
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  Culture, population structure, and low genetic diversity in Pleistocene hominins
  L. S. Premo and Jean-Jacques Hublin
  
  PNAS January 6, 2009 106 (1) 33-37; https://doi.org/10.1073/pnas.0809194105
Applied Biological Sciences
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  The key role of the surface membrane in why gastropod nacre grows in towers
  Antonio G. Checa, Julyan H. E. Cartwright, and Marc-Georg Willinger
  
  PNAS January 6, 2009 106 (1) 38-43; https://doi.org/10.1073/pnas.0808796106
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  Combined targeting of lentiviral vectors and positioning of transduced cells by magnetic nanoparticles
  Andreas Hofmann, Daniela Wenzel, Ulrich M. Becher, Daniel F. Freitag, Alexandra M. Klein, Dietmar Eberbeck, Maike Schulte, Katrin Zimmermann, Christian Bergemann, Bernhard Gleich, Wilhelm Roell, Thomas Weyh, Lutz Trahms, Georg Nickenig, Bernd K. Fleischmann, and Alexander Pfeifer
  
  PNAS January 6, 2009 106 (1) 44-49; https://doi.org/10.1073/pnas.0803746106
Biochemistry
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  Slow peptide bond formation by proline and other N-alkylamino acids in translation
  Michael Y. Pavlov, Richard E. Watts, Zhongping Tan, Virginia W. Cornish, Måns Ehrenberg, and Anthony C. Forster
  
  PNAS January 6, 2009 106 (1) 50-54; https://doi.org/10.1073/pnas.0809211106
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  Wnt signaling targets ETO coactivation domain of TAF4/TFIID in vivo
  Kevin J. Wright and Robert Tjian
  
  PNAS January 6, 2009 106 (1) 55-60; https://doi.org/10.1073/pnas.0811914106
  
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  TAF4 takes flight
  - Feb 03, 2009
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  PKCη regulates occludin phosphorylation and epithelial tight junction integrity
  Takuya Suzuki, Bertha C. Elias, Ankur Seth, Le Shen, Jerrold R. Turner, Francesco Giorgianni, Dominic Desiderio, Ramareddy Guntaka, and Radhakrishna Rao
  
  PNAS January 6, 2009 106 (1) 61-66; https://doi.org/10.1073/pnas.0802741106
Biophysics
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  Identification of direct residue contacts in protein–protein interaction by message passing
  Martin Weigt, Robert A. White, Hendrik Szurmant, James A. Hoch, and Terence Hwa
  
  PNAS January 6, 2009 106 (1) 67-72; https://doi.org/10.1073/pnas.0805923106
- You have access
  Folding energy landscape and network dynamics of small globular proteins
  Naoto Hori, George Chikenji, R. Stephen Berry, and Shoji Takada
  
  PNAS January 6, 2009 106 (1) 73-78; https://doi.org/10.1073/pnas.0811560106
- You have access
  Directed self-organization of single DNA molecules in a nanoslit via embedded nanopit arrays
  From the Cover
  
  Walter Reisner, Niels B. Larsen, Henrik Flyvbjerg, Jonas O. Tegenfeldt, and Anders Kristensen
  
  PNAS January 6, 2009 106 (1) 79-84; https://doi.org/10.1073/pnas.0811468106
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  Transmission of allostery through the lectin domain in selectin-mediated cell adhesion
  Travis T. Waldron and Timothy A. Springer
  
  PNAS January 6, 2009 106 (1) 85-90; https://doi.org/10.1073/pnas.0810620105
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  Structural basis for selectin mechanochemistry
  Timothy A. Springer
  
  PNAS January 6, 2009 106 (1) 91-96; https://doi.org/10.1073/pnas.0810784105
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  Accurate SHAPE-directed RNA structure determination
  Katherine E. Deigan, Tian W. Li, David H. Mathews, and Kevin M. Weeks
  
  PNAS January 6, 2009 106 (1) 97-102; https://doi.org/10.1073/pnas.0806929106
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  Dynamics of one-state downhill protein folding
  Peng Li, Fabiana Y. Oliva, Athi N. Naganathan, and Victor Muñoz
  
  PNAS January 6, 2009 106 (1) 103-108; https://doi.org/10.1073/pnas.0802986106
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  Resolving cadherin interactions and binding cooperativity at the single-molecule level
  Yunxiang Zhang, Sanjeevi Sivasankar, W. James Nelson, and Steven Chu
  
  PNAS January 6, 2009 106 (1) 109-114; https://doi.org/10.1073/pnas.0811350106
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  Unliganded gating of acetylcholine receptor channels
  Prasad Purohit and Anthony Auerbach
  
  PNAS January 6, 2009 106 (1) 115-120; https://doi.org/10.1073/pnas.0809272106
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  Condensation of FtsZ filaments can drive bacterial cell division
  Ganhui Lan, Brian R. Daniels, Terrence M. Dobrowsky, Denis Wirtz, and Sean X. Sun
  
  PNAS January 6, 2009 106 (1) 121-126; https://doi.org/10.1073/pnas.0807963106
- Open Access
  Mapping RNA exit channel on transcribing RNA polymerase II by FRET analysis
  Chin-Yu Chen, Chia-Chi Chang, Chi-Fu Yen, Michael T.-K. Chiu, and Wei-Hau Chang
  
  PNAS January 6, 2009 106 (1) 127-132; https://doi.org/10.1073/pnas.0811689106
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  Filament rigidity causes F-actin depletion from nonbinding surfaces
  Charles I. Fisher and Scot C. Kuo
  
  PNAS January 6, 2009 106 (1) 133-138; https://doi.org/10.1073/pnas.0804991106
- Open Access
  A conserved protonation-dependent switch controls drug binding in the Abl kinase
  Yibing Shan, Markus A. Seeliger, Michael P. Eastwood, Filipp Frank, Huafeng Xu, Morten Ø Jensen, Ron O. Dror, John Kuriyan, and David E. Shaw
  
  PNAS January 6, 2009 106 (1) 139-144; https://doi.org/10.1073/pnas.0811223106
Cell Biology
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  Imaging the glycome
  Inaugural Article
  
  Scott T. Laughlin and Carolyn R. Bertozzi
  
  PNAS January 6, 2009 106 (1) 12-17; https://doi.org/10.1073/pnas.0811481106
  
  See companion article:
  Profile of Carolyn Bertozzi
  - Feb 16, 2010
- You have access
  Force generation by a dynamic Z-ring in Escherichia coli cell division
  Jun F. Allard and Eric N. Cytrynbaum
  
  PNAS January 6, 2009 106 (1) 145-150; https://doi.org/10.1073/pnas.0808657106
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  Disruption of the SRC-1 gene in mice suppresses breast cancer metastasis without affecting primary tumor formation
  Shu Wang, Yuhui Yuan, Lan Liao, Shao-Qing Kuang, Jean Ching-Yi Tien, Bert W. O'Malley, and Jianming Xu
  
  PNAS January 6, 2009 106 (1) 151-156; https://doi.org/10.1073/pnas.0808703105
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  Reprogramming of murine and human somatic cells using a single polycistronic vector
  Bryce W. Carey, Styliani Markoulaki, Jacob Hanna, Kris Saha, Qing Gao, Maisam Mitalipova, and Rudolf Jaenisch
  
  PNAS January 6, 2009 106 (1) 157-162; https://doi.org/10.1073/pnas.0811426106
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  A role for the host coatomer and KDEL receptor in early vaccinia biogenesis
  Leiliang Zhang, Stella Y. Lee, Galina V. Beznoussenko, Peter J. Peters, Jia-Shu Yang, Hui-ya Gilbert, Abraham L. Brass, Stephen J. Elledge, Stuart N. Isaacs, Bernard Moss, Alexander Mironov, and Victor W. Hsu
  
  PNAS January 6, 2009 106 (1) 163-168; https://doi.org/10.1073/pnas.0811631106
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  Continuous elimination of oxidized nucleotides is necessary to prevent rapid onset of cellular senescence
  Priyamvada Rai, Tamer T. Onder, Jennifer J. Young, Jose L. McFaline, Bo Pang, Peter C. Dedon, and Robert A. Weinberg
  
  PNAS January 6, 2009 106 (1) 169-174; https://doi.org/10.1073/pnas.0809834106
Developmental Biology
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  Two-step oligoclonal development of male germ cells
  Hiroo Ueno, Brit B. Turnbull, and Irving L. Weissman
  
  PNAS January 6, 2009 106 (1) 175-180; https://doi.org/10.1073/pnas.0810325105
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  Essential functions of the Williams-Beuren syndrome-associated TFII-I genes in embryonic development
  Badam Enkhmandakh, Aleksandr V. Makeyev, Lkhamsuren Erdenechimeg, Frank H. Ruddle, Nyam-Osor Chimge, Maria Isabel Tussie-Luna, Ananda L. Roy, and Dashzeveg Bayarsaihan
  
  PNAS January 6, 2009 106 (1) 181-186; https://doi.org/10.1073/pnas.0811531106
Ecology
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  Simple prediction of interaction strengths in complex food webs
  Eric L. Berlow, Jennifer A. Dunne, Neo D. Martinez, Philip B. Stark, Richard J. Williams, and Ulrich Brose
  
  PNAS January 6, 2009 106 (1) 187-191; https://doi.org/10.1073/pnas.0806823106
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  Great ranging associated with greater reproductive investment in mammals
  Herman Pontzer and Jason M. Kamilar
  
  PNAS January 6, 2009 106 (1) 192-196; https://doi.org/10.1073/pnas.0806105106
- Open Access
  Trophic cascades promote threshold-like shifts in pelagic marine ecosystems
  Michele Casini, Joakim Hjelm, Juan-Carlos Molinero, Johan Lövgren, Massimiliano Cardinale, Valerio Bartolino, Andrea Belgrano, and Georgs Kornilovs
  
  PNAS January 6, 2009 106 (1) 197-202; https://doi.org/10.1073/pnas.0806649105
Environmental Sciences
- Open Access
  On the fate of anthropogenic nitrogen
  William H. Schlesinger
  
  PNAS January 6, 2009 106 (1) 203-208; https://doi.org/10.1073/pnas.0810193105
Evolution
- Open Access
  Two-phase increase in the maximum size of life over 3.5 billion years reflects biological innovation and environmental opportunity
  Jonathan L. Payne, Alison G. Boyer, James H. Brown, Seth Finnegan, Michał Kowalewski, Richard A. Krause Jr., S. Kathleen Lyons, Craig R. McClain, Daniel W. McShea, Philip M. Novack-Gottshall, Felisa A. Smith, Jennifer A. Stempien, and Steve C. Wang
  
  PNAS January 6, 2009 106 (1) 24-27; https://doi.org/10.1073/pnas.0806314106
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  Population genetics of Trypanosoma brucei gambiense, the agent of sleeping sickness in Western Africa
  Mathurin Koffi, Thierry De Meeûs, Bruno Bucheton, Philippe Solano, Mamadou Camara, Dramane Kaba, Gérard Cuny, Francisco J. Ayala, and Vincent Jamonneau
  
  PNAS January 6, 2009 106 (1) 209-214; https://doi.org/10.1073/pnas.0811080106
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  Genome rhetoric and the emergence of compositional bias
  Kalin Vetsigian and Nigel Goldenfeld
  
  PNAS January 6, 2009 106 (1) 215-220; https://doi.org/10.1073/pnas.0810122106
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  Contrasted patterns of hyperdiversification in Mediterranean hotspots
  Hervé Sauquet, Peter H. Weston, Cajsa Lisa Anderson, Nigel P. Barker, David J. Cantrill, Austin R. Mast, and Vincent Savolainen
  
  PNAS January 6, 2009 106 (1) 221-225; https://doi.org/10.1073/pnas.0805607106
Genetics
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  Whole-genome association study identifies STK39 as a hypertension susceptibility gene
  From the Cover
  
  Ying Wang, Jeffrey R. O'Connell, Patrick F. McArdle, James B. Wade, Sarah E. Dorff, Sanjiv J. Shah, Xiaolian Shi, Lin Pan, Evadnie Rampersaud, Haiqing Shen, James D. Kim, Arohan R. Subramanya, Nanette I. Steinle, Afshin Parsa, Carole C. Ober, Paul A. Welling, Aravinda Chakravarti, Alan B. Weder, Richard S. Cooper, Braxton D. Mitchell, Alan R. Shuldiner, and Yen-Pei C. Chang
  
  PNAS January 6, 2009 106 (1) 226-231; https://doi.org/10.1073/pnas.0808358106
  
  See companion article:
  In This Issue
  - Jan 06, 2009
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  Sic1-induced DNA rereplication during meiosis
  Kara E. Sawarynski, Nicole A. Najor, Andrea C. Kepsel, and George S. Brush
  
  PNAS January 6, 2009 106 (1) 232-237; https://doi.org/10.1073/pnas.0809731105
- Open Access
  A regulatory interplay between miR-27a and Runx1 during megakaryopoiesis
  Oren Ben-Ami, Niv Pencovich, Joseph Lotem, Ditsa Levanon, and Yoram Groner
  
  PNAS January 6, 2009 106 (1) 238-243; https://doi.org/10.1073/pnas.0811466106
- Open Access
  ChIP-on-chip significance analysis reveals large-scale binding and regulation by human transcription factor oncogenes
  Adam A. Margolin, Teresa Palomero, Pavel Sumazin, Andrea Califano, Adolfo A. Ferrando, and Gustavo Stolovitzky
  
  PNAS January 6, 2009 106 (1) 244-249; https://doi.org/10.1073/pnas.0806445106
Medical Sciences
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  Targeting Nrf2 with the triterpenoid CDDO- imidazolide attenuates cigarette smoke-induced emphysema and cardiac dysfunction in mice
  From the Cover
  
  Thomas E. Sussan, Tirumalai Rangasamy, David J. Blake, Deepti Malhotra, Hazim El-Haddad, Djahida Bedja, Melinda S. Yates, Ponvijay Kombairaju, Masayuki Yamamoto, Karen T. Liby, Michael B. Sporn, Kathleen L. Gabrielson, Hunter C. Champion, Rubin M. Tuder, Thomas W. Kensler, and Shyam Biswal
  
  PNAS January 6, 2009 106 (1) 250-255; https://doi.org/10.1073/pnas.0804333106
  
  See companion article:
  In This Issue
  - Jan 06, 2009
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  Efficient colonic mucosal wound repair requires Trem2 signaling
  Hiroshi Seno, Hiroyuki Miyoshi, Sarah L. Brown, Michael J. Geske, Marco Colonna, and Thaddeus S. Stappenbeck
  
  PNAS January 6, 2009 106 (1) 256-261; https://doi.org/10.1073/pnas.0803343106
  
  See companion article:
  In This Issue
  - Jan 06, 2009
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  Scaffold-based discovery of indeglitazar, a PPAR pan-active anti-diabetic agent
  Dean R. Artis, Jack J. Lin, Chao Zhang, Weiru Wang, Upasana Mehra, Mylene Perreault, David Erbe, Heike I. Krupka, Bruce P. England, James Arnold, Alexander N. Plotnikov, Adhirai Marimuthu, Hoa Nguyen, Sarah Will, Maxime Signaevsky, John Kral, John Cantwell, Calvin Settachatgull, Douglas S. Yan, Daniel Fong, Angela Oh, Shenghua Shi, Patrick Womack, Benjamin Powell, Gaston Habets, Brian L. West, Kam Y. J. Zhang, Michael V. Milburn, George P. Vlasuk, K. Peter Hirth, Keith Nolop, Gideon Bollag, Prabha N. Ibrahim, and James F. Tobin
  
  PNAS January 6, 2009 106 (1) 262-267; https://doi.org/10.1073/pnas.0811325106
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  The role of PTEN/Akt/PI3K signaling in the maintenance and viability of prostate cancer stem-like cell populations
  Anna Dubrovska, Sungeun Kim, Richard J. Salamone, John R. Walker, Sauveur-Michel Maira, Carlos García-Echeverría, Peter G. Schultz, and Venkateshwar A. Reddy
  
  PNAS January 6, 2009 106 (1) 268-273; https://doi.org/10.1073/pnas.0810956106
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  Activated protein C ligation of ApoER2 (LRP8) causes Dab1-dependent signaling in U937 cells
  Xia V. Yang, Yajnavalka Banerjee, José A. Fernández, Hiroshi Deguchi, Xiao Xu, Laurent O. Mosnier, Rolf. T. Urbanus, Phillip G. de Groot, Tara C. White-Adams, Owen J. T. McCarty, and John H. Griffin
  
  PNAS January 6, 2009 106 (1) 274-279; https://doi.org/10.1073/pnas.0807594106
Microbiology
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  Structurally diverse natural products that cause potassium leakage trigger multicellularity in Bacillus subtilis
  Daniel López, Michael A. Fischbach, Frances Chu, Richard Losick, and Roberto Kolter
  
  PNAS January 6, 2009 106 (1) 280-285; https://doi.org/10.1073/pnas.0810940106
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  Changes in H5N1 influenza virus hemagglutinin receptor binding domain affect systemic spread
  Hui-Ling Yen, Jerry R. Aldridge, Adrianus C. M. Boon, Natalia A. Ilyushina, Rachelle Salomon, Diane J. Hulse-Post, Henju Marjuki, John Franks, David A. Boltz, Dorothy Bush, Aleksandr S. Lipatov, Richard J. Webby, Jerold E. Rehg, and Robert G. Webster
  
  PNAS January 6, 2009 106 (1) 286-291; https://doi.org/10.1073/pnas.0811052106
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  Transformation and isolation of allelic exchange mutants of Chlamydia psittaci using recombinant DNA introduced by electroporation
  Rachel Binet and Anthony T. Maurelli
  
  PNAS January 6, 2009 106 (1) 292-297; https://doi.org/10.1073/pnas.0806768106
Neuroscience
- Open Access
  An empirical explanation of aperture effects
  From the Cover
  
  Kyongje Sung, William T. Wojtach, and Dale Purves
  
  PNAS January 6, 2009 106 (1) 298-303; https://doi.org/10.1073/pnas.0811702106
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  De novo generation of a transmissible spongiform encephalopathy by mouse transgenesis
  Christina J. Sigurdson, K. Peter R. Nilsson, Simone Hornemann, Mathias Heikenwalder, Giuseppe Manco, Petra Schwarz, David Ott, Thomas Rülicke, Pawel P. Liberski, Christian Julius, Jeppe Falsig, Lothar Stitz, Kurt Wüthrich, and Adriano Aguzzi
  
  PNAS January 6, 2009 106 (1) 304-309; https://doi.org/10.1073/pnas.0810680105
  
  See companion article:
  Constraining the loop, releasing prion infectivity
  - Jan 06, 2009
  
  In This Issue
  - Jan 06, 2009
- Open Access
  The Drosophila cell adhesion molecule Klingon is required for long-term memory formation and is regulated by Notch
  Motomi Matsuno, Junjiro Horiuchi, Tim Tully, and Minoru Saitoe
  
  PNAS January 6, 2009 106 (1) 310-315; https://doi.org/10.1073/pnas.0807665106
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  Synaptic activity-responsive element in the Arc/Arg3.1 promoter essential for synapse-to-nucleus signaling in activated neurons
  Takashi Kawashima, Hiroyuki Okuno, Mio Nonaka, Aki Adachi-Morishima, Nan Kyo, Michiko Okamura, Sayaka Takemoto-Kimura, Paul F. Worley, and Haruhiko Bito
  
  PNAS January 6, 2009 106 (1) 316-321; https://doi.org/10.1073/pnas.0806518106
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  Localizing interference during naming: Convergent neuroimaging and neuropsychological evidence for the function of Broca's area
  Tatiana T. Schnur, Myrna F. Schwartz, Daniel Y. Kimberg, Elizabeth Hirshorn, H. Branch Coslett, and Sharon L. Thompson-Schill
  
  PNAS January 6, 2009 106 (1) 322-327; https://doi.org/10.1073/pnas.0805874106
- Open Access
  Dividing glial cells maintain differentiated properties including complex morphology and functional synapses
  Woo-Ping Ge, Wei Zhou, Qingming Luo, Lily Yeh Jan, and Yuh Nung Jan
  
  PNAS January 6, 2009 106 (1) 328-333; https://doi.org/10.1073/pnas.0811353106
Physiology
- Open Access
  Glyconanoparticles allow pre-symptomatic in vivo imaging of brain disease
  Sander I. van Kasteren, Sandra J. Campbell, Sébastien Serres, Daniel C. Anthony, Nicola R. Sibson, and Benjamin G. Davis
  
  PNAS January 6, 2009 106 (1) 18-23; https://doi.org/10.1073/pnas.0806787106
  
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  In This Issue
  - Jan 06, 2009
Plant Biology
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  Incremental steps toward incompatibility revealed by Arabidopsis epistatic interactions modulating salicylic acid pathway activation
  Rubén Alcázar, Ana V. García, Jane E. Parker, and Matthieu Reymond
  
  PNAS January 6, 2009 106 (1) 334-339; https://doi.org/10.1073/pnas.0811734106
Psychology
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  The absence of reward induces inequity aversion in dogs
  From the Cover
  
  Friederike Range, Lisa Horn, Zsófia Viranyi, and Ludwig Huber
  
  PNAS January 6, 2009 106 (1) 340-345; https://doi.org/10.1073/pnas.0810957105

Correction

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Correction for Shahrezaei and Swain et al., Analytical distributions for stochastic gene expression
PNAS January 6, 2009 106 (1) 346; https://doi.org/10.1073/pnas.0811545106

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