Of course I tried to open the corresponding mmCIF, but CHIMERA candidate 1.15 build 42258 linux64 answered that the cif file [line 3] appears in tag name entry.id and it was not opened ---------- Forwarded message --------- From: Francesco Pietra <chiendarret@gmail.com> Date: Sat, Apr 10, 2021 at 6:45 PM Subject: combine models To: chimera <chimera-users@cgl.ucsf.edu> Hi (1) I am faced by the coordinates for a nucleics/protein assembly being given in several bundle.pdb, while I need a sequential, continuous pdb file that comprises all nucleotides and proteins, not made of models (2) If I load all the bundles to chimera, I see all expected ligands around the small molecule. (3) With all models selected, copy/combine (adopting default first model as reference and allowing renaming chains) generates a new model. The new model laks some proteins that should lie near the ligand, as described at (2). I feel that I am missing something. Thanks for advice francesco pietra