<div dir="ltr"><div dir="ltr"><p style="margin:0in"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, helvetica, sans-serif">Dear Phenix users,</font></span></p><p style="margin:0in"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, helvetica, sans-serif"> </font></span></p><p style="margin:0in"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, helvetica, sans-serif">This is an update for the Phenix <span class="gmail-il">video</span> <span class="gmail-il">tutorials</span>. </font></span></p><p style="margin:0in"><br></p><p style="margin:0in"><font face="arial, helvetica, sans-serif">We have a new tutorial explaining the use of </font><a href="https://www.phenix-online.org/documentation/reference/secondary_structure.html" style="font-family:arial,helvetica,sans-serif">secondary_structure_restraints</a><font face="arial, helvetica, sans-serif">, a type of restraints especially useful at low resolution (lower than 3Å, cryo-EM map or X-ray data).</font></p><p style="margin:0in"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, helvetica, sans-serif"><br></font></span></p><p style="margin:0in">References:<br></p><p style="margin:0in"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, helvetica, sans-serif"></font></span></p><p style="margin:0in">Programming new geometry restraints: parallelity of atomic groups. Sobolev OV et al. J. Appl. Cryst. 48, 1130-1141 (2015).</p><p style="margin:0in"><a href="https://doi.org/10.1107/S1600576715010432">https://doi.org/10.1107/S1600576715010432</a></p><p style="margin:0in">Use of knowledge-based restraints in phenix.refine to improve macromolecular refinement at low resolution. Headd JJ et al. Acta Cryst. D68, 381-390 (2012). <br></p><p style="margin:0in"><a href="https://doi.org/10.1107/S0907444911047834">https://doi.org/10.1107/S0907444911047834</a></p><p style="margin:0in"><br></p><p style="margin:0in"><font face="arial, helvetica, sans-serif"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">Feedback about the videos is very welcome. Write an email to </span><a href="mailto:tutorials@phenix-online.org" target="_blank"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><span class="gmail-il">tutorials</span>@phenix-online.org</span></a><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"> or use the comment section on YouTube. </span></font><span style="font-family:arial,helvetica,sans-serif">If you want to see a</span><span style="font-family:arial,helvetica,sans-serif"> </span><span class="gmail-il" style="font-family:arial,helvetica,sans-serif">tutorial</span><span style="font-family:arial,helvetica,sans-serif"> </span><span style="font-family:arial,helvetica,sans-serif">about a certain (Phenix-related) topic, let us know.</span><br></p><p></p><p style="margin:0in"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, helvetica, sans-serif"></font></span></p><p style="margin:0in"><font face="arial, helvetica, sans-serif"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">Best wishes,</span></font></p><p style="margin:0in"><font face="arial, helvetica, sans-serif"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"> </span></font></p><p style="margin:0in"><font face="arial, helvetica, sans-serif"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">The Phenix team</span></font></p><p style="margin:0in"><font face="arial, helvetica, sans-serif"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><br></span></font></p><p style="margin:0in"><font face="arial, helvetica, sans-serif"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial">-------------------------------</span></font></p><p style="margin:0in"><font face="arial, helvetica, sans-serif"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><br></span></font></p><p style="margin:0in"><font face="arial, helvetica, sans-serif">Overview of tutorials:</font></p><p style="margin:0in"><font face="arial, helvetica, sans-serif"><a href="https://www.phenix-online.org/documentation/reference/tutorial_channel.html" target="_blank">https://www.phenix-online.org/documentation/reference/tutorial_channel.html</a></font></p><p style="margin:0in"><br></p><p style="margin:0in"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, helvetica, sans-serif">You can also browse the videos on the Phenix <span class="gmail-il">Tutorial</span> YouTube channel:</font></span></p><p style="margin:0in"><span style="background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, helvetica, sans-serif"><a href="https://www.youtube.com/c/phenixtutorials" target="_blank">https://www.youtube.com/c/phenixtutorials</a><br></font></span></p><p style="margin:0in"><font face="arial, helvetica, sans-serif">(To see subtitles, hit the cc (closed captions) button in the right bottom of the <span class="gmail-il">video</span> screen. Subscribe to see the <span class="gmail-il">tutorial</span> videos in your YouTube subscription feed. To get notifications about new videos, tap the bell button, which is next to the &quot;subscribe&quot; button.)</font></p></div></div>