Catálogo de publicaciones - revistas

<jats:title>Host-pathogen point-counterpoint</jats:title> <jats:p> The arms race between pathogen and host is a well-known phenomenon. Ma <jats:italic>et al.</jats:italic> have now identified how an enzymatically inactive protein can abet a pathogen's infectivity. The pathogenic oomycete <jats:italic>Phytophthora sojae</jats:italic> secretes xyloglucanase that damages soybean cell walls. Soybean, in turn, secretes a defense protein that binds to and inactivates the xyloglucanase. To counteract this plant defense, the oomycete deploys a product of its own gene duplication: an inactive enzyme that binds the plant's defense protein. With the defense protein unproductively bound to the decoy, the oomycete can successfully invade the soybean cells. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6326" page="710" related-article-type="in-this-issue" vol="355" xlink:href="10.1126/science.aai7919">710</jats:related-article> </jats:p>

<jats:title>Stamping hydrogen into metal</jats:title> <jats:p>In 1935, Wigner and Huntington predicted that molecular hydrogen would become an atomic metal at a pressure of 25 GPa. Eighty years and more than 400 GPa later, Dias and Silvera have finally produced metallic hydrogen at low temperature. The metallization occurred between 465 and nearly 500 GPa at 5.5 K. Spectroscopic measurements verified that hydrogen was in the atomic state. The observation completes an unexpectedly long quest to find the metallic hydrogen that Wigner and Huntington predicted so long ago.</jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6326" page="715" related-article-type="in-this-issue" vol="355" xlink:href="10.1126/science.aal1579">715</jats:related-article> </jats:p>

<jats:title>Organic compounds detected on Ceres</jats:title><jats:p>Water and organic molecules were delivered to the early Earth by the impacts of comets and asteroids. De Sanctis<jats:italic>et al.</jats:italic>examined infrared spectra taken by the Dawn spacecraft as it orbited Ceres, the largest object in the asteroid belt (see the Perspective by Küppers). In some small patches on the surface, they detected absorption bands characteristic of aliphatic organic compounds. The authors ruled out an external origin, such as an impact, suggesting that the material must have formed on Ceres. Together with other compounds detected previously, this supports the existence of a complex prebiotic chemistry at some point in Ceres' history.</jats:p><jats:p><jats:italic>Science</jats:italic>, this issue p.<jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6326" page="719" related-article-type="in-this-issue" vol="355" xlink:href="10.1126/science.aaj2305">719</jats:related-article>; see also p.<jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6326" page="692" related-article-type="in-this-issue" vol="355" xlink:href="10.1126/science.aal4765">692</jats:related-article></jats:p>