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THIS WEEK IN PNAS

In This Issue
PNAS 2007 104: 20637-20638. [Full Text] [PDF]  

LETTERS (Online only)

Per J. Palsbøll, Martine Bérubé, and Finn Larsen

Could genetic diversity in eastern North Pacific gray whales reflect global historic abundance?
PNAS 2007 104: E2; published online on December 18, 2007, 10.1073/pnas.0710072105 [Extract] [Full Text] [PDF]  

S. E. Alter and S. R. Palumbi

Could genetic diversity in eastern North Pacific gray whales reflect global historic abundance?
PNAS 2007 104: E3; published online on December 18, 2007, 10.1073/pnas.0710472105 [Extract] [Full Text] [Figures Only] [PDF]  

COMMENTARIES

Rob W. H. Ruigrok and Denis Gerlier

Structure of the measles virus H glycoprotein sheds light on an efficient vaccine
PNAS 2007 104: 20639-20640; published online on December 17, 2007, 10.1073/pnas.0709995105 [Extract] [Full Text] [PDF]  
See companion article on page 19535 in issue 49 of volume 104

Thomas C. Brunold

Synthetic iron-oxo "diamond core" mimics structure of key intermediate in methane monooxygenase catalytic cycle
PNAS 2007 104: 20641-20642; published online on December 19, 2007, 10.1073/pnas.0710734105 [Extract] [Full Text] [Figures Only] [PDF]  
See companion article on page 20713

Andreas Taubert

Controlling water transport through artificial polymer/protein hybrid membranes
PNAS 2007 104: 20643-20644; published online on December 19, 2007, 10.1073/pnas.0710864105 [Extract] [Full Text] [Figures Only] [PDF]  
See companion article on page 20719

Xiaohong H. Yang and Lee Zou

Launching a ubiquitination cascade at DNA breaks
PNAS 2007 104: 20645-20646; published online on December 19, 2007, 10.1073/pnas.0710916105 [Extract] [Full Text] [PDF]  
See companion article on page 20759

Oliver Haworth and Christopher D. Buckley

Resolving the problem of persistence in the switch from acute to chronic inflammation
PNAS 2007 104: 20647-20648; published online on December 18, 2007, 10.1073/pnas.0710633105 [Extract] [Full Text] [Figures Only] [PDF]  
See companion article on page 20979

Marc R. Knight

New ideas on root hair growth appear from the flanks
PNAS 2007 104: 20649-20650; published online on December 19, 2007, 10.1073/pnas.0710632105 [Extract] [Full Text] [Figures Only] [PDF]  
See companion article on page 20996

SPECIAL FEATURE

Perspectives

B. L. Turner, II, Eric F. Lambin, and Anette Reenberg

Land Change Science Special Feature: The emergence of land change science for global environmental change and sustainability
PNAS 2007 104: 20666-20671; published online on December 19, 2007, 10.1073/pnas.0704119104 [Abstract] [Full Text] [Figures Only] [PDF]  

Research Articles

Elena G. Irwin and Nancy E. Bockstael

From the Cover: Land Change Science Special Feature: The evolution of urban sprawl: Evidence of spatial heterogeneity and increasing land fragmentation
PNAS 2007 104: 20672-20677; published online on December 19, 2007, 10.1073/pnas.0705527105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Steven M. Manson and Tom Evans

Land Change Science Special Feature: Agent-based modeling of deforestation in southern Yucatán, Mexico, and reforestation in the Midwest United States
PNAS 2007 104: 20678-20683; published online on December 19, 2007, 10.1073/pnas.0705802104 [Abstract] [Full Text] [Figures Only] [PDF]  

Sandra Díaz, Sandra Lavorel, Francesco de Bello, Fabien Quétier, Karl Grigulis, and T. Matthew Robson

Land Change Science Special Feature: Incorporating plant functional diversity effects in ecosystem service assessments
PNAS 2007 104: 20684-20689; published online on December 19, 2007, 10.1073/pnas.0704716104 [Abstract] [Full Text] [Figures Only] [PDF]  

D. Mark Stafford Smith, Greg M. McKeon, Ian W. Watson, Beverley K. Henry, Grant S. Stone, Wayne B. Hall, and S. Mark Howden

Land Change Science Special Feature: Learning from episodes of degradation and recovery in variable Australian rangelands
PNAS 2007 104: 20690-20695; published online on December 19, 2007, 10.1073/pnas.0704837104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Deborah Lawrence, Paolo D'Odorico, Lucy Diekmann, Marcia DeLonge, Rishiraj Das, and James Eaton

Land Change Science Special Feature: Ecological feedbacks following deforestation create the potential for a catastrophic ecosystem shift in tropical dry forest
PNAS 2007 104: 20696-20701; published online on December 19, 2007, 10.1073/pnas.0705005104 [Abstract] [Full Text] [Figures Only] [PDF]  

PROFILES

Farooq Ahmed

Profile of Mark E. Davis
PNAS 2007 104: 20651-20653; published online on December 18, 2007, 10.1073/pnas.0704959105 [Extract] [Full Text] [Figures Only] [PDF]  

Kaspar Mossman

Profile of George Schatz
PNAS 2007 104: 20654-20655; published online on December 18, 2007, 10.1073/pnas.0710466104 [Extract] [Full Text] [Figures Only] [PDF]  

Tinsley H. Davis

Profile of Christopher Miller
PNAS 2007 104: 20656-20658; published online on December 19, 2007, 10.1073/pnas.0710738105 [Extract] [Full Text] [Figures Only] [PDF]  

PHYSICAL SCIENCES

Applied Mathematics

Sandeep Krishna, Szabolcs Semsey, and Kim Sneppen

Combinatorics of feedback in cellular uptake and metabolism of small molecules
PNAS 2007 104: 20815-20819; published online on December 19, 2007, 10.1073/pnas.0706231105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Applied Physical Sciences

Plamen Ch. Ivanov, Kun Hu, Michael F. Hilton, Steven A. Shea, and H. Eugene Stanley

Endogenous circadian rhythm in human motor activity uncoupled from circadian influences on cardiac dynamics
PNAS 2007 104: 20702-20707; published online on December 19, 2007, 10.1073/pnas.0709957104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Unyoung Kim, Chih-Wen Shu, Karen Y. Dane, Patrick S. Daugherty, Jean Y. J. Wang, and H. T. Soh

Selection of mammalian cells based on their cell-cycle phase using dielectrophoresis
PNAS 2007 104: 20708-20712; published online on December 19, 2007, 10.1073/pnas.0708760104 [Abstract] [Full Text] [Figures Only] [PDF]  

Chemistry

Genqiang Xue, Dong Wang, Raymond De Hont, Adam T. Fiedler, Xiaopeng Shan, Eckard Münck, and Lawrence Que, Jr.

A synthetic precedent for the [Fe^IV₂(µ-O)₂] diamond core proposed for methane monooxygenase intermediate Q
PNAS 2007 104: 20713-20718; published online on December 19, 2007, 10.1073/pnas.0708516105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  
See Commentary on page 20641

Manish Kumar, Mariusz Grzelakowski, Julie Zilles, Mark Clark, and Wolfgang Meier From the Cover: Highly permeable polymeric membranes based on the incorporation of the functional water channel protein Aquaporin Z PNAS 2007 104: 20719-20724; published online on December 11, 2007, 10.1073/pnas.0708762104 [Abstract] [Full Text] [Figures Only] [PDF]   See Commentary on page 20643

Eduard Schreiner, Nisanth N. Nair, Rodolphe Pollet, Volker Staemmler, and Dominik Marx

Dynamical magnetostructural properties of Anabaena ferredoxin
PNAS 2007 104: 20725-20730; published online on December 18, 2007, 10.1073/pnas.0706740104 [Abstract] [Full Text] [Figures Only] [PDF]  

Arthur J. Olson, Yunfeng H. E. Hu, and Ehud Keinan Chemical mimicry of viral capsid self-assembly PNAS 2007 104: 20731-20736; published online on December 18, 2007, 10.1073/pnas.0709489104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information] OPEN ACCESS ARTICLE

Mikhail V. Rekharsky, Tadashi Mori, Cheng Yang, Young Ho Ko, N. Selvapalam, Hyunuk Kim, David Sobransingh, Angel E. Kaifer, Simin Liu, Lyle Isaacs, Wei Chen, Sarvin Moghaddam, Michael K. Gilson, Kimoon Kim, and Yoshihisa Inoue

A synthetic host-guest system achieves avidin-biotin affinity by overcoming enthalpy–entropy compensation
PNAS 2007 104: 20737-20742; published online on December 19, 2007, 10.1073/pnas.0706407105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Fiona S. Mackay, Julie A. Woods, Pavla Heringová, Jana Kaspárková, Ana M. Pizarro, Stephen A. Moggach, Simon Parsons, Viktor Brabec, and Peter J. Sadler A potent cytotoxic photoactivated platinum complex PNAS 2007 104: 20743-20748; published online on December 19, 2007, 10.1073/pnas.0707742105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information] OPEN ACCESS ARTICLE

Simon Ebbinghaus, Seung Joong Kim, Matthias Heyden, Xin Yu, Udo Heugen, Martin Gruebele, David M. Leitner, and Martina Havenith

An extended dynamical hydration shell around proteins
PNAS 2007 104: 20749-20752; published online on December 19, 2007, 10.1073/pnas.0709207104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Figure]  

Rene A. Nome, Jason Ming Zhao, Wouter D. Hoff, and Norbert F. Scherer

Axis-dependent anisotropy in protein unfolding from integrated nonequilibrium single-molecule experiments, analysis, and simulation
PNAS 2007 104: 20799-20804; published online on December 19, 2007, 10.1073/pnas.0701281105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

SOCIAL SCIENCES

Anthropology

Social Sciences

Elena G. Irwin and Nancy E. Bockstael

From the Cover: Land Change Science Special Feature: The evolution of urban sprawl: Evidence of spatial heterogeneity and increasing land fragmentation
PNAS 2007 104: 20672-20677; published online on December 19, 2007, 10.1073/pnas.0705527105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Steven M. Manson and Tom Evans

Land Change Science Special Feature: Agent-based modeling of deforestation in southern Yucatán, Mexico, and reforestation in the Midwest United States
PNAS 2007 104: 20678-20683; published online on December 19, 2007, 10.1073/pnas.0705802104 [Abstract] [Full Text] [Figures Only] [PDF]  

Sustainability Science

Steven M. Manson and Tom Evans

Land Change Science Special Feature: Agent-based modeling of deforestation in southern Yucatán, Mexico, and reforestation in the Midwest United States
PNAS 2007 104: 20678-20683; published online on December 19, 2007, 10.1073/pnas.0705802104 [Abstract] [Full Text] [Figures Only] [PDF]  

D. Mark Stafford Smith, Greg M. McKeon, Ian W. Watson, Beverley K. Henry, Grant S. Stone, Wayne B. Hall, and S. Mark Howden

Land Change Science Special Feature: Learning from episodes of degradation and recovery in variable Australian rangelands
PNAS 2007 104: 20690-20695; published online on December 19, 2007, 10.1073/pnas.0704837104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

BIOLOGICAL SCIENCES

Anthropology

Biochemistry

Bin Wang and Stephen J. Elledge Ubc13/Rnf8 ubiquitin ligases control foci formation of the Rap80/Abraxas/Brca1/Brcc36 complex in response to DNA damage PNAS 2007 104: 20759-20763; published online on December 5, 2007, 10.1073/pnas.0710061104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Figure] OPEN ACCESS ARTICLE   See Commentary on page 20645

Oriol Gallego, F. Xavier Ruiz, Albert Ardèvol, Marta Domínguez, Rosana Alvarez, Angel R. de Lera, Carme Rovira, Jaume Farrés, Ignacio Fita, and Xavier Parés

Structural basis for the high all-trans-retinaldehyde reductase activity of the tumor marker AKR1B10
PNAS 2007 104: 20764-20769; published online on December 17, 2007, 10.1073/pnas.0705659105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Martin T. Croft, Michael Moulin, Michael E. Webb, and Alison G. Smith

Thiamine biosynthesis in algae is regulated by riboswitches
PNAS 2007 104: 20770-20775; published online on December 18, 2007, 10.1073/pnas.0705786105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Toshiharu Suzuki, Yoko Ozaki, Nobuhito Sone, Boris A. Feniouk, and Masasuke Yoshida

The product of uncI gene in F₁F_o-ATP synthase operon plays a chaperone-like role to assist c-ring assembly
PNAS 2007 104: 20776-20781; published online on December 14, 2007, 10.1073/pnas.0708075105 [Abstract] [Full Text] [Figures Only] [PDF]  

Ian C. Dews and Kevin R. MacKenzie

Transmembrane domains of the syndecan family of growth factor coreceptors display a hierarchy of homotypic and heterotypic interactions
PNAS 2007 104: 20782-20787; published online on December 19, 2007, 10.1073/pnas.0708909105 [Abstract] [Full Text] [Figures Only] [PDF]  

Reto Horst, Wayne A. Fenton, S. Walter Englander, Kurt Wüthrich, and Arthur L. Horwich Folding trajectories of human dihydrofolate reductase inside the GroEL–GroES chaperonin cavity and free in solution PNAS 2007 104: 20788-20792; published online on December 19, 2007, 10.1073/pnas.0710042105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information] OPEN ACCESS ARTICLE

Jung Hwa Kim, Ji Min Lee, Hye Jin Nam, Hee June Choi, Jung Woo Yang, Jason S. Lee, Mi Hyang Kim, Su-Il Kim, Chin Ha Chung, Keun Il Kim, and Sung Hee Baek

SUMOylation of pontin chromatin-remodeling complex reveals a signal integration code in prostate cancer cells
PNAS 2007 104: 20793-20798; published online on December 17, 2007, 10.1073/pnas.0710343105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Figures]  

Biophysics

Eduard Schreiner, Nisanth N. Nair, Rodolphe Pollet, Volker Staemmler, and Dominik Marx

Dynamical magnetostructural properties of Anabaena ferredoxin
PNAS 2007 104: 20725-20730; published online on December 18, 2007, 10.1073/pnas.0706740104 [Abstract] [Full Text] [Figures Only] [PDF]  

Arthur J. Olson, Yunfeng H. E. Hu, and Ehud Keinan Chemical mimicry of viral capsid self-assembly PNAS 2007 104: 20731-20736; published online on December 18, 2007, 10.1073/pnas.0709489104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information] OPEN ACCESS ARTICLE

Rene A. Nome, Jason Ming Zhao, Wouter D. Hoff, and Norbert F. Scherer

Axis-dependent anisotropy in protein unfolding from integrated nonequilibrium single-molecule experiments, analysis, and simulation
PNAS 2007 104: 20799-20804; published online on December 19, 2007, 10.1073/pnas.0701281105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Henry D. Herce and Angel E. Garcia Molecular dynamics simulations suggest a mechanism for translocation of the HIV-1 TAT peptide across lipid membranes PNAS 2007 104: 20805-20810; published online on December 18, 2007, 10.1073/pnas.0706574105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information] OPEN ACCESS ARTICLE

Audrius Jasaitis, Mikael P. Johansson, Mårten Wikström, Marten H. Vos, and Michael I. Verkhovsky

Nanosecond electron tunneling between the hemes in cytochrome bo₃
PNAS 2007 104: 20811-20814; published online on December 17, 2007, 10.1073/pnas.0709876105 [Abstract] [Full Text] [Figures Only] [PDF]  
See Commentary on page 403

Cell Biology

Sandeep Krishna, Szabolcs Semsey, and Kim Sneppen

Combinatorics of feedback in cellular uptake and metabolism of small molecules
PNAS 2007 104: 20815-20819; published online on December 19, 2007, 10.1073/pnas.0706231105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Carrie E. Johnson, Yolanda Y. Huang, Amanda B. Parrish, Michelle I. Smith, Allyson E. Vaughn, Qian Zhang, Kevin M. Wright, Terry Van Dyke, Robert J. Wechsler-Reya, Sally Kornbluth, and Mohanish Deshmukh

Differential Apaf-1 levels allow cytochrome c to induce apoptosis in brain tumors but not in normal neural tissues
PNAS 2007 104: 20820-20825; published online on December 18, 2007, 10.1073/pnas.0709101105 [Abstract] [Full Text] [Figures Only] [PDF]  

Roger S.-Y. Foo, Young-Jae Nam, Marc Jason Ostreicher, Mark D. Metzl, Russell S. Whelan, Chang-Fu Peng, Anthony W. Ashton, Weimin Fu, Kartik Mani, Suet-Feung Chin, Elena Provenzano, Ian Ellis, Nichola Figg, Sarah Pinder, Martin R. Bennett, Carlos Caldas, and Richard N. Kitsis Regulation of p53 tetramerization and nuclear export by ARC PNAS 2007 104: 20826-20831; published online on December 17, 2007, 10.1073/pnas.0710017104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information] OPEN ACCESS ARTICLE

Naoko Mizuno, Akihiro Narita, Takahide Kon, Kazuo Sutoh, and Masahide Kikkawa

Three-dimensional structure of cytoplasmic dynein bound to microtubules
PNAS 2007 104: 20832-20837; published online on December 19, 2007, 10.1073/pnas.0710406105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Developmental Biology

Charles Durand, Catherine Robin, Karine Bollerot, Margaret H. Baron, Katrin Ottersbach, and Elaine Dzierzak

Embryonic stromal clones reveal developmental regulators of definitive hematopoietic stem cells
PNAS 2007 104: 20838-20843; published online on December 17, 2007, 10.1073/pnas.0706923105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Ning Liu, Andrew H. Williams, Yuri Kim, John McAnally, Svetlana Bezprozvannaya, Lillian B. Sutherland, James A. Richardson, Rhonda Bassel-Duby, and Eric N. Olson

An intragenic MEF2-dependent enhancer directs muscle-specific expression of microRNAs 1 and 133
PNAS 2007 104: 20844-20849; published online on December 19, 2007, 10.1073/pnas.0710558105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Jianlong Wang, Thorold W. Theunissen, and Stuart H. Orkin Site-directed, virus-free, and inducible RNAi in embryonic stem cells PNAS 2007 104: 20850-20855; published online on December 18, 2007, 10.1073/pnas.0710565105 [Abstract] [Full Text] [Figures Only] [PDF] OPEN ACCESS ARTICLE

Ecology

Sandra Díaz, Sandra Lavorel, Francesco de Bello, Fabien Quétier, Karl Grigulis, and T. Matthew Robson

Land Change Science Special Feature: Incorporating plant functional diversity effects in ecosystem service assessments
PNAS 2007 104: 20684-20689; published online on December 19, 2007, 10.1073/pnas.0704716104 [Abstract] [Full Text] [Figures Only] [PDF]  

Chadwick V. Tillberg, David A. Holway, Edward G. LeBrun, and Andrew V. Suarez

Trophic ecology of invasive Argentine ants in their native and introduced ranges
PNAS 2007 104: 20856-20861; published online on December 19, 2007, 10.1073/pnas.0706903105 [Abstract] [Full Text] [Figures Only] [PDF]  

Matt J. Rayner, Mark E. Hauber, Michael J. Imber, Rosalie K. Stamp, and Mick N. Clout

Spatial heterogeneity of mesopredator release within an oceanic island system
PNAS 2007 104: 20862-20865; published online on December 14, 2007, 10.1073/pnas.0707414105 [Abstract] [Full Text] [Figures Only] [PDF]  
See Commentary on page 9

Popko Wiersma, Mark A. Chappell, and Joseph B. Williams

Cold- and exercise-induced peak metabolic rates in tropical birds
PNAS 2007 104: 20866-20871; published online on December 18, 2007, 10.1073/pnas.0707683104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Genetics

Immunology

Jean-David Bouaziz, Koichi Yanaba, Guglielmo M. Venturi, Yaming Wang, Roland M. Tisch, Jonathan C. Poe, and Thomas F. Tedder

Therapeutic B cell depletion impairs adaptive and autoreactive CD4⁺ T cell activation in mice
PNAS 2007 104: 20878-20883; published online on December 19, 2007, 10.1073/pnas.0709205105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Luis Vence, A. Karolina Palucka, Joseph W. Fay, Tomoki Ito, Yong-Jun Liu, Jacques Banchereau, and Hideki Ueno

Circulating tumor antigen-specific regulatory T cells in patients with metastatic melanoma
PNAS 2007 104: 20884-20889; published online on December 18, 2007, 10.1073/pnas.0710557105 [Abstract] [Full Text] [Figures Only] [PDF]  

Medical Sciences

Plamen Ch. Ivanov, Kun Hu, Michael F. Hilton, Steven A. Shea, and H. Eugene Stanley

Endogenous circadian rhythm in human motor activity uncoupled from circadian influences on cardiac dynamics
PNAS 2007 104: 20702-20707; published online on December 19, 2007, 10.1073/pnas.0709957104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Kimberly M. Szymanski, Derk Binns, René Bartz, Nick V. Grishin, Wei-Ping Li, Anil K. Agarwal, Abhimanyu Garg, Richard G. W. Anderson, and Joel M. Goodman

The lipodystrophy protein seipin is found at endoplasmic reticulum lipid droplet junctions and is important for droplet morphology
PNAS 2007 104: 20890-20895; published online on December 18, 2007, 10.1073/pnas.0704154104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Tables]  

G. C. DeLuca, S. V. Ramagopalan, B. M. Herrera, D. A. Dyment, M. R. Lincoln, A. Montpetit, M. Pugliatti, M. C. N. Barnardo, N. J. Risch, A. D. Sadovnick, M. Chao, S. Sotgiu, T. J. Hudson, and G. C. Ebers

An extremes of outcome strategy provides evidence that multiple sclerosis severity is determined by alleles at the HLA-DRB1 locus
PNAS 2007 104: 20896-20901; published online on December 17, 2007, 10.1073/pnas.0707731105 [Abstract] [Full Text] [Figures Only] [PDF]  

Josée Guirouilh-Barbat, Emilie Rass, Isabelle Plo, Pascale Bertrand, and Bernard S. Lopez Defects in XRCC4 and KU80 differentially affect the joining of distal nonhomologous ends PNAS 2007 104: 20902-20907; published online on December 18, 2007, 10.1073/pnas.0708541104 [Abstract] [Full Text] [Figures Only] [PDF] OPEN ACCESS ARTICLE   See Commentary on page 405

Sukhvir P. Mahal, Christopher A. Baker, Cheryl A. Demczyk, Emery W. Smith, Christian Julius, and Charles Weissmann Prion strain discrimination in cell culture: The cell panel assay PNAS 2007 104: 20908-20913; published online on December 11, 2007, 10.1073/pnas.0710054104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Figures] OPEN ACCESS ARTICLE   See Commentary on page 11

David W. Colby, Qiang Zhang, Shuyi Wang, Darlene Groth, Giuseppe Legname, Detlev Riesner, and Stanley B. Prusiner

Prion detection by an amyloid seeding assay
PNAS 2007 104: 20914-20919; published online on December 20, 2007, 10.1073/pnas.0710152105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Nathan J. Robertson, Frances A. Brook, Richard L. Gardner, Stephen P. Cobbold, Herman Waldmann, and Paul J. Fairchild

Embryonic stem cell-derived tissues are immunogenic but their inherent immune privilege promotes the induction of tolerance
PNAS 2007 104: 20920-20925; published online on December 18, 2007, 10.1073/pnas.0710265105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Atsushi Kaneda, Chiaochun J. Wang, Raymond Cheong, Winston Timp, Patrick Onyango, Bo Wen, Christine A. Iacobuzio-Donahue, Rolf Ohlsson, Rita Andraos, Mark A. Pearson, Alexei A. Sharov, Dan L. Longo, Minoru S. H. Ko, Andre Levchenko, and Andrew P. Feinberg

Enhanced sensitivity to IGF-II signaling links loss of imprinting of IGF2 to increased cell proliferation and tumor risk
PNAS 2007 104: 20926-20931; published online on December 17, 2007, 10.1073/pnas.0710359105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

James Bean, Cameron Brennan, Jin-Yuan Shih, Gregory Riely, Agnes Viale, Lu Wang, Dhananjay Chitale, Noriko Motoi, Janos Szoke, Stephen Broderick, Marissa Balak, Wen-Cheng Chang, Chong-Jen Yu, Adi Gazdar, Harvey Pass, Valerie Rusch, William Gerald, Shiu-Feng Huang, Pan-Chyr Yang, Vincent Miller, Marc Ladanyi, Chih-Hsin Yang, and William Pao MET amplification occurs with or without T790M mutations in EGFR mutant lung tumors with acquired resistance to gefitinib or erlotinib PNAS 2007 104: 20932-20937; published online on December 18, 2007, 10.1073/pnas.0710370104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information] OPEN ACCESS ARTICLE

E. Rosines, R. V. Sampogna, K. Johkura, D. A. Vaughn, Y. Choi, H. Sakurai, M. M. Shah, and S. K. Nigam Staged in vitro reconstitution and implantation of engineered rat kidney tissue PNAS 2007 104: 20938-20943; published online on December 17, 2007, 10.1073/pnas.0710428105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information] OPEN ACCESS ARTICLE

Eleonora Palma, Cristina Roseti, Francesca Maiolino, Sergio Fucile, Katiuscia Martinello, Manuela Mazzuferi, Eleonora Aronica, Mario Manfredi, Vincenzo Esposito, Gianpaolo Cantore, Ricardo Miledi, Michele Simonato, and Fabrizio Eusebi

GABA_A-current rundown of temporal lobe epilepsy is associated with repetitive activation of GABA_A "phasic" receptors
PNAS 2007 104: 20944-20948; published online on December 14, 2007, 10.1073/pnas.0710522105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Table]  

Microbiology

Wenjun Ma, Amy L. Vincent, Marie R. Gramer, Christy B. Brockwell, Kelly M. Lager, Bruce H. Janke, Phillip C. Gauger, Devi P. Patnayak, Richard J. Webby, and Jürgen A. Richt

Identification of H2N3 influenza A viruses from swine in the United States
PNAS 2007 104: 20949-20954; published online on December 18, 2007, 10.1073/pnas.0710286104 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Neuroscience

Jeongyeon Kim, Sukwon Lee, Kyungjoon Park, Ingie Hong, Beomjong Song, Gihoon Son, Heewoo Park, Woon Ryoung Kim, Eunjin Park, Han Kyung Choe, Hyun Kim, Changjoong Lee, Woong Sun, Kyungjin Kim, Ki Soon Shin, and Sukwoo Choi

Amygdala depotentiation and fear extinction
PNAS 2007 104: 20955-20960; published online on December 26, 2007, 10.1073/pnas.0710548105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

Marta I. Garrido, James M. Kilner, Stefan J. Kiebel, and Karl J. Friston

Evoked brain responses are generated by feedback loops
PNAS 2007 104: 20961-20966; published online on December 17, 2007, 10.1073/pnas.0706274105 [Abstract] [Full Text] [Figures Only] [PDF]  

Karla L. Miller, Daniel P. Bulte, Hannah Devlin, Matthew D. Robson, Richard G. Wise, Mark W. Woolrich, Peter Jezzard, and Timothy E. J. Behrens

Evidence for a vascular contribution to diffusion FMRI at high b value
PNAS 2007 104: 20967-20972; published online on December 19, 2007, 10.1073/pnas.0707257105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information]  

James P. Fawcett, John Georgiou, Julie Ruston, Friedhelm Bladt, Andrew Sherman, Neil Warner, Bechara J. Saab, Rizaldy Scott, John C. Roder, and Tony Pawson Nck adaptor proteins control the organization of neuronal circuits important for walking PNAS 2007 104: 20973-20978; published online on December 18, 2007, 10.1073/pnas.0710316105 [Abstract] [Full Text] [Figures Only] [PDF] [Supporting Information] OPEN ACCESS ARTICLE

Pharmacology

Physiology

Sami F. Noujaim, Omer Berenfeld, Jérôme Kalifa, Marina Cerrone, Kumaraswamy Nanthakumar, Felipe Atienza, Javier Moreno, Sergey Mironov, and José Jalife

Universal scaling law of electrical turbulence in the mammalian heart
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Lei Chen, Michelle L. Marquardt, David J. Tester, Kevin J. Sampson, Michael J. Ackerman, and Robert S. Kass Mutation of an A-kinase-anchoring protein causes long-QT syndrome PNAS 2007 104: 20990-20995; published online on December 19, 2007, 10.1073/pnas.0710527105 [Abstract] [Full Text] [Figures Only] [PDF] OPEN ACCESS ARTICLE

Plant Biology