ANSWER WITH MATLAB CODE
The B-factor of atoms in protein structures deposited in the PDBdatabase (www.pdb.org) describes the displacement of each atom fromits average location. The atoms on the surface of proteins tend tobe more mobile and as a result have large B-factor values, whereasthose in the core of the protein are restricted and have smallerB-factor values.
Write a function pdb_bfactor that takes a fourletter PDB identifier and returns the average B factor of all ofthe CA (alpha carbon) atoms. Your function should download the pdbfile from pdb.org website, e.g., if the PDB id “1crn” is given asinput, your function should download
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