I have a list of Protein ID such as Q9S9U6, A2XLL2, Q06402.
What name is this ID? UniProtKB ID?
And how can I get PDB ID from this list?
Is its PDB ID only one?

I'm using Python.

[Get a list of PDB ids from a list of sequence protein number?](https://bioinformatics.stackexchange.com/questions/4959/get-a-list-of-pdb-ids-from-a-list-of-sequence-protein-number)

That method of this link gives me some IDs but not only one and usually empty.