AC  Accession no.

DT  Date (created); author
DT  Date (updated); author, i.e. last update

NA  Name

SY  Synonyms

OS  Species
OC  Biological classification (taxonomy) of "species"

HO  Homologs
CL  Classification (class accession no.; name)

SZ  Size (length in bp)

LO  chromosomal and/or cytological location
DE  GENE accession no.; Description, i.e. gene or gene product
DP  S/MAR position relative to the gene mentioned in the DE line
    (Direction; 1st position of S/MAR DNA; last position of S/MAR DNA;
    definition of 1st position)
DN  Internal S/MAR (_y_es/_n_o); number of neighbor genes (within the
    same loop directly upstream and/or downstream of that mentioned in the DE line);
    description of these genes
DC  Comment on S/MAR position (optional)

SQ  Sequence
SC  Sequence comment, i.e. source of the nucleic acid sequence

FT  Feature table (1st position; last position; feature)

SF  Structural features

BP  Binding potential (in vitro); [Ref]
TP  Type of S/MAR, i.e. constitutive or facultative; [Ref]
CH  Character, e.g. boundary; [Ref]

FF  Functional features

CP  Cell specificity (positive)
CN  Cell specificity (negative)

EV  Evidence (experiment by which this sequence was shown to be a S/MAR [Ref])
EC  Comment on evidence
EP  Probe (if only a subfragment has been used in the proof experiment)

BF  Bound factor, i.e.  S/MARbinder accession no.; name [Ref]
MM  Method   (and if so) dissociation constant
PR  S/MAR probe (when only a subfragment was used in experiment)
SO  S/MARbinder source, species
QA  Quality of interaction

DR  External database (EMBL:(/GenBank) accession no.; EMBL identifier)

RN  Reference no.
RX  MEDLINE ID
RA  Reference authors
RT  Reference title
RL  Reference data
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