Let's try to identify the structures in the red circle.
The chains of each structure are about 60,
perhaps the biggest number of chains in a PDB file!
Let's enter the PDB website and click on "Advanced Search",on the right end of the search (blue) bar.
Select "Sequence Features" in the "Choose a Query Type"field.
Select "Number of chains" in the "Choose a Query" field.
Let's type "55" as minimum number of chains.
Let's type "65" as maximum number of chains.
We will have just 2 results.
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