Specify template without alignment:
If you want I-TASSER to use a specific PDB structure as a
template, you can use this option specify the PDB structure.
You only need to type in the PDBID:ChainID, e.g. 1wor:A without
specifying the target-template alignments.If the chain information is not
present in the PDB file, indicate the ChainID using "_".I-TASSER will first
fetch the structure from the PDB library and then generate
the target-template alignment based on our in-house alignment tool,