I'm looking at the structure of this protein, which I beleive is supposed to be a single polypeptide chain, since on the PDB page it says:
Unique protein chains: 1
But using the 3D viewer, there seem to be a few "loose ends" i.e. it looks like the protein is composed of multiple polypeptide chains.
This is was I see - you can see a separate chain there at the bottom.
Where am I going wrong here?