Atomic data for complex macromolecules (proteins) obtained using experimental methods
such as X-ray crystallography, NMR and electron microscopy can be obtained from
the RSCB Protein Databank. Over the last 30 years, over
10,000 structures have been deposited at the database. Each data file (.pdb file extension)
contains information about experimental conditions and experiment details, atomic sequence, crystallographic parameters and the atomic structure of the molecule.
The atomic structure (x,y,z) has been extracted to plot this projection of the molecule.