[Chimera-users] Displaying side chains

[Manish Manish]

I have opened  PDB ID 1iep using "fetch structure by ID from PDB" through
chimera GUI menu. I can see the side chain of few residues such as PHE
317.A and Valine 299.A are automatically displayed. Also by moving the
mouse cursor, one can find the distance between different atom types such
as between CA and CB. Whereas side chain of many residues such as Lysine
274.A and ASP.276 have not been displayed.

My question is how the chimera decides this differential display? Whether
chimera directly uses information from PDB files to differentially display
the side chains and distance. Or chimera has its own algorithms to decide
this. It will be a great help for me if one can point me toward the
portions of PDB file or source code from Chimera which does this.

I have also attached the image file.

Sincerely
Manish
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