Hello, I’m Liyana, a PhD student from University of Glasgow. I’m using Chimera to dock my low resolution cryo-EM map to my pdb file, where the EM map represents a helical oligomeric form of the pdb file. So far, I’ve made multiple copies of my pdb and fitted it against my EM map and now I’m trying to save my multiple files as one file. I’ve referred to this message on the Chimera mailing list (www.cgl.ucsf.edu/pipermail/chimera-users/2014-May/009926.html<http://www.cgl.ucsf.edu/pipermail/chimera-users/2014-May/009926.html>) and tried saving my files via ‘Save PDB’ and combining my files to one file. However, I couldn’t upload this on PyMOL or any other programs for subsequent analysis. Is there something wrong with my file? Attached is my file after using instruction A. I’ve also tried combining my files using the ‘combined’ feature but still get the same problem. Attached is my file after using instruction B. Could you have a look at these files, please? Thank you for your time. Best wishes, Liyana