Dear Chimera X community, I’m a new user of Chimera X and I have a question about the built-in Modeller function in Chimera X Previously in Chimera 2, we use the “Model/Refine Loop” function to model missing residues in the experimental structure, before any further calculation or simulations. The “Model/Refine Loop” function uses Modeller and the function provides modeled, complete structures in which the non-missing residues do not move. In Chimera X, a similar function is “Modeller Comparative” but it works differently. The “Modeller Comparative” performs a modeling for the full structure with the given sequence. Is possible in Chimera X to model the missing residues, without moving the existent residues? Thank you for your kind advice in advance! Thanks, Amy -- Amy He Chemistry Graduate Teaching Assistant Hadad Research Group Ohio State University he.1768@osu.edu<mailto:he.1768@osu.edu>