Title Section

This section contains records used to describe the experiment and the biological macromolecules present in the entry: HEADER, OBSLTE, TITLE, CAVEAT, COMPND, SOURCE, KEYWDS, EXPDTA, AUTHOR, REVDAT, SPRSDE, JRNL, and REMARK records. The changes in records in this section are described below.

REMARK 4

Remark 4 indicates the version of the PDB file format used to generate the file. Version 3.0 files will include a version remark like the following:

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REMARK   4
REMARK   4 1ABC COMPLIES WITH FORMAT V. 3.0, 1-DEC-2006
REMARK   4
REMARK   4 THIS FILE IS A TEST VERSION.                                         
REMARK   4                                                                      
REMARK   4 THIS IS THE REMEDIATED VERSION OF THIS PDB ENTRY.                    
REMARK   4 REMEDIATED DATA FILE REVISION 3.100 (2007-03-17)

REMARKs 102-199

The text remarks for nucleic acids will reflect the standardization of nomenclature for the polymer nucleotides described in later sections. In particular, the polymeric deoxyribonucleotides are represented by 2-letter codes DC, DG, DA, DT to distinguish these from their ribonucletide counterparts. The asterisk character in the in saccharide atom names is replaced by the single prime character. The text of REMARK 105 is correspondingly changed as follows.

REMARK 105

Remark 105 is mandatory if nucleic acids exist in an entry.

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REMARK 105
REMARK 105 THE PROTEIN DATA BANK HAS ADOPTED THE SACCHARIDE CHEMISTS
REMARK 105 NOMENCLATURE FOR ATOMS OF THE DEOXYRIBOSE/RIBOSE MOIETY
REMARK 105 RATHER THAN THAT OF THE NUCLEOSIDE CHEMISTS.  THE RING
REMARK 105 OXYGEN ATOM IS LABELLED O4' INSTEAD OF O1'.