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PDB File Format Contents Guide Version (20 December 1996) PDB File Format ? Title Section ? Primary Structure Section ? Heterogen Section ? Secondary Structure Section ? Connectivity Annotation Section ? Miscellaneous Features Section ? Crystallographic and Coordinate Transformation Section ? Coordinate Section ? Connectivity Section ? Bookkeeping Section mmCIF file format ? CIF was developed by the IUCr Working Party on Crystallographic Information .39。s PDB ID, you can search by keyword from the home page, or SearchLite, as described below. Quickly search QuickSearch allows to simultaneously search the text of mmCIF files and the Web pages. An 39。 search is performed on an index of the mmCIF files and an index of the static PDB Web pages. Structure search example ? Find all structure containing the phrase “protein kinase” Structure search example 2 ? Find all structure containing the phrase “protein” and “kinase” Query result Have 201 results Select one Download PDB file View PDB file Structure view options View protein 。 and 39。 is an acronym for the Crystallographic Information File. CIF is a subset of STAR (Self