Prelude ============ Requirements ------------ This tutorial requires, in addition to *Scipion* (plugins `scipion-em-chimera `_ , `scipion-em-phenix `_ ), the `PHENIX suite `_ and `scipion-em-modelangelo `_, the requirements specified in `model-angelo `_. We'd like to hear from you -------------------------- We have tested and verified the different steps described in this demo to the best of our knowledge, but since our programs are in continuous development you may find inaccuracies and errors in the text. Please let us know about any errors, as well as your suggestions for future editions, by writing to scipion@cnb.csic.es.