File formats and fields used in PLACE database

ID   Identifier
XX
AC   Accession number
XX
DT   Date (operation) author
XX
DE   Description (regulation, gene, transacting factor, etc.) 
XX
KW   Keywords
XX
OS   species
XX
RA1   Reference-1 Authors
RT1   Reference-1 Title
RL1   Reference-1 Literature data
RC1   Reference-1 Criteria (DNase I footprinting study / Chemical          
         modifications / Gel retardation assay / homology / other)
RD1   Reference-1 external Database (MEDLINE number or   
                               DDBJ/EMBL/GenBank accession number)
XX
RA2   Reference-2 Authors
RT2   Reference-2 Title
RL2   Reference-2 Literature data
RC2   Reference-2 Criteria
RD2   Reference-2 external Database
XX
SQ
     Sequence of the cis-acting regulatory DNA element
//
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