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