Dear all, I am building into a 3.5A map and am having difficulty with some loop regions. Is there a way in coot to use backbone libraries to maintain reasonable stereochemistry for these loops? If not, what's the best way to build reasonable loops at low resolution in a coot-centric world? Cheers, Janet -- Dr Janet Deane Postdoctoral Researcher Sir William Dunn School of Pathology South Parks Rd University of Oxford OX1 3RE United Kingdom Phone: +44 1865 275385