Information about the source: http://www.wwpdb.org/docs.html#format
CITATION STYLE
Callaway, J., Cummings, M., & Deroski, B. (1996). Protein Data Bank contents guide: Atomic coordinate entry format description. Brookhaven National Laboratory, 1–190. Retrieved from http://scholar.google.com/scholar?hl=en&btnG=Search&q=intitle:Protein+Data+Bank+Contents+Guide+:+Atomic+Coordinate+Entry+Format+Description#2
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