An RNA transcript helps to bring together homologous chromosomes during cell division.Authors: Da-Qiao Ding, Kasumi Okamasa, Miho Yamane, Chihiro Tsutsumi, Tokuko Haraguchi, Masayuki Yamamoto, Yasushi Hiraoka

An enzyme that binds to damaged DNA undergoes a structural reorganization that enhances its catalytic activity.Authors: Marie-France Langelier, Jamie L. Planck, Swati Roy, John M. Pascal

Polarized proto-cadherin and myosin induce an anisotropic tension at cell junctions and thereby shape epithelial tissue.Authors: Floris Bosveld, Isabelle Bonnet, Boris Guirao, Sham Tlili, Zhimin Wang, Ambre Petitalot, Raphaël Marchand, Pierre-Luc Bardet, Philippe Marcq, François Graner, Yohanns Bellaïche

The inhibitor Lefty diffuses more widely than the activator Nodal.Authors: Patrick Müller, Katherine W. Rogers, Ben M. Jordan, Joon S. Lee, Drew Robson, Sharad Ramanathan, Alexander F. Schier

A chemical screen using mesenchymal stem cells identifies a small molecule, kartogenin, that can promote chondrogenesis.Authors: Kristen Johnson, Shoutian Zhu, Matthew S. Tremblay, Joshua N. Payette, Jianing Wang, Laure C. Bouchez, Shelly Meeusen, Alana Althage, Charles Y. Cho, Xu Wu, Peter G. Schultz

Wall paintings in a Mayan temple dating to the 9th century C.E. show calculations of Moon and, perhaps, planetary motion.Authors: William A. Saturno, David Stuart, Anthony F. Aveni, Franco Rossi

The stable isotopic composition of the carbon in carbon dioxide over the last 24,000 years illuminates past carbon cycle behavior.Authors: Jochen Schmitt, Robert Schneider, Joachim Elsig, Daiana Leuenberger, Anna Lourantou, Jérôme Chappellaz, Peter Köhler, Fortunat Joos, Thomas F. Stocker, Markus Leuenberger, Hubertus Fischer

Computational models predict the long-term recurrence of earthquakes along a segment of the San Andreas Fault.Authors: Sylvain Barbot, Nadia Lapusta, Jean-Philippe Avouac

Optical coupling is used to control the tunneling of electrons between a pair of quantum wells.Authors: Peter Cristofolini, Gabriel Christmann, Simeon I. Tsintzos, George Deligeorgis, George Konstantinidis, Zacharias Hatzopoulos, Pavlos G. Savvidis, Jeremy J. Baumberg

Spacecraft data provide a detailed characterization of the second most massive asteroid in the solar system.Authors: Vishnu Reddy, Andreas Nathues, Lucille Le Corre, Holger Sierks, Jian-Yang Li, Robert Gaskell, Timothy McCoy, Andrew W. Beck, Stefan E. Schröder, Carle M. Pieters, Kris J. Becker, Bonnie J. Buratti, Brett Denevi, David T. Blewett, Ulrich Christensen, Michael J. Gaffey, Pablo Gutierrez-Marques, Michael Hicks, Horst Uwe Keller, Thorsten Maue, Stefano Mottola, Lucy A. McFadden, Harry Y. McSween, David Mittlefehldt, David P. O’Brien, Carol Raymond, Christopher Russell

Spacecraft data provide a detailed characterization of the second most massive asteroid in the solar system.Authors: M. C. De Sanctis, E. Ammannito, M. T. Capria, F. Tosi, F. Capaccioni, F. Zambon, F. Carraro, S. Fonte, A. Frigeri, R. Jaumann, G. Magni, S. Marchi, T. B. McCord, L. A. McFadden, H. Y. McSween, D. W. Mittlefehldt, A. Nathues, E. Palomba, C. M. Pieters, C. A. Raymond, C. T. Russell, M. J. Toplis, D. Turrini

Spacecraft data provide a detailed characterization of the second most massive asteroid in the solar system.Authors: Paul Schenk, David P. O’Brien, Simone Marchi, Robert Gaskell, Frank Preusker, Thomas Roatsch, Ralf Jaumann, Debra Buczkowski, Thomas McCord, Harry Y. McSween, David Williams, Aileen Yingst, Carol Raymond, Chris Russell

Spacecraft data provide a detailed characterization of the second most massive asteroid in the solar system.Authors: S. Marchi, H. Y. McSween, D. P. O’Brien, P. Schenk, M. C. De Sanctis, R. Gaskell, R. Jaumann, S. Mottola, F. Preusker, C. A. Raymond, T. Roatsch, C. T. Russell

Spacecraft data provide a detailed characterization of the second most massive asteroid in the solar system.Authors: R. Jaumann, D. A. Williams, D. L. Buczkowski, R. A. Yingst, F. Preusker, H. Hiesinger, N. Schmedemann, T. Kneissl, J. B. Vincent, D. T. Blewett, B. J. Buratti, U. Carsenty, B. W. Denevi, M. C. De Sanctis, W. B. Garry, H. U. Keller, E. Kersten, K. Krohn, J.-Y. Li, S. Marchi, K. D. Matz, T. B. McCord, H. Y. McSween, S. C. Mest, D. W. Mittlefehldt, S. Mottola, A. Nathues, G. Neukum, D. P. O’Brien, C. M. Pieters, T. H. Prettyman, C. A. Raymond, T. Roatsch, C. T. Russell, P. Schenk, B. E. Schmidt, F. Scholten, K. Stephan, M. V. Sykes, P. Tricarico, R. Wagner, M. T. Zuber, H. Sierks

Spacecraft data provide a detailed characterization of the second most massive asteroid in the solar system.Authors: C. T. Russell, C. A. Raymond, A. Coradini, H. Y. McSween, M. T. Zuber, A. Nathues, M. C. De Sanctis, R. Jaumann, A. S. Konopliv, F. Preusker, S. W. Asmar, R. S. Park, R. Gaskell, H. U. Keller, S. Mottola, T. Roatsch, J. E. C. Scully, D. E. Smith, P. Tricarico, M. J. Toplis, U. R. Christensen, W. C. Feldman, D. J. Lawrence, T. J. McCoy, T. H. Prettyman, R. C. Reedy, M. E. Sykes, T. N. Titus

A carbon isotope record helps to explain why carbon dioxide concentrations change during ice age cycles.Author: Edward Brook

RNA plays a role in homologous chromosome pairing during meiosis.Author: Abby F. Dernburg

The tunneling of electrons through barriers can be controlled when photons are coupled to excited states of electrons trapped in quantum wells.Author: Marzena H. Szymańska

A model structure sheds light on how the PARP-1 protein is activated in DNA repair.Authors: Jean-Philippe Gagné, Michèle Rouleau, Guy G. Poirier

Sophisticated numerical models can reproduce a wide range of seismic activity at the Parkfield segment of the San Andreas Fault.Author: Paul Segall