[PyMOL] repair the missing loop in crystal structure

Dear pymol users,     Are there anyone know how to modeling the missing fragment in a crystal structure? This missing fragment may be a flexible loop and so its disordered the electron density is invisible.Thanks. Yeping Sun CAS Key Laboratory of Pathogenic Microbiology Immunology INSTITUTE OF

[PyMOL] symmetry operation to generate the whole virus particle

Dear pymol users:   Usually pymol can show only one chain when you open a pdb file of virus particles (such as 2buk,1sva, etc.). I am trying to create the whole virus particle and I know it may need applying symmetry operations. And these symmetry operation has been given in the pdb files. For