[Chimera-users] Ligand has no chain ID after saving docked complex

Hello. I want to use PRODIGY web server to predict the binding affinity of my docked complexes, and the server requires a single PDB file containing both the docked ligand and the protein. I open the .pdbqt file containing the docking results using ViewDock and then I open my receptor file in .pdb format. I combine the two (receptor and the best ligand) and then save the complex as a PDB file. The server requires the ligand's name and what chain it's on, but when I open the complex in Chimera the ligand has no chain ID, it just shows up as "het". How do I assign a chain ID to my ligand in this situation?