Only standard codes of aminoacids are recognized in PDB files.
<li>
PDB files can be downloaded from the PDB database based on given PDB code.
-To select only single chain use PDB_code:chain_id notation (5G3Q:B)
+To select only a single chain use PDB_code:chain_id notation (for example
+5G3Q:B), chain_id is case sensitive.
<li>
Unres server requires input PDB files with continuous (without breaks)
protein chains. PDB files with gaps in the structure have to be first prepared