[PyMOL] Create a PDB file of a Biological Unit and keep secondary structure information

[Maximilian E. <m....@um...>]

Dear list,

today I realized that if I create a single PDB file of a biological unit (i.e. a tetramer of monomers) the secondary structure information isn't kept. The way I create such a file is:

fetch 2RH2, type=pdb1
split_states 2RH2, 
delete 2RH2
alter all, segi = model[-4:]
rewind
save 2RH2_tetra.pdb, all

If I open this file the secondary structure of each monomer in the tetramer visualized by "show cartoon" isn't the same as before saving (i.e. beta-sheets length is different etc.). Any ideas why?

Thank you very much,

Dipl.-Ing. Maximilian Ebert

Étudiant au doctorat en biochimie
Laboratoire du Dr. Joelle Pelletier
Université de Montréal

m....@um...