[chimerax-users] .pdb from Protein Data Bank has more chains than expected

[McClean, Phillip]

Hi Everyone,

I downloaded the 7FDL .pdb from the Protein Data Bank.  I was expecting just two chains (it is a heteromeric complex), but I found 12 chains in the file (A-L).  I was expecting two chains because the manuscript suggested they were just modeling protein fragments of the two protein.  It appears that chains that A,C,E,G,I,K are multiple models of one fragment, while chains B,D,F,H,J,L are multiple models of the second fragment.

Two questions.  Why are multiple structures reported, and how to I visualize just two fragments at the same time, for example A and B.

I have attached the .pdb file.

Thanks for any advise.

Phil McClean


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