Many genome projects submitting a lot of HTG or WGS entries can often provide the information to assemble a series of their entries and reconstruct a genome structure. An accession number would be assigned for such contig tiling path, and call it "CON entry", which is classified into CON division.

CON entries have CONTIG lines that indicate accession numbers of citation sequences (piece entries) and their tiling order to construct the contig. The nucleotide sequence of CON entry is not shown on DDBJ flat file.

We can NOT directly accept the submission of CON entry. At first you have to submit all piece entries to construct the contig, then a CON entry will be constructed.

AGP file is required to submit CON entries.

You can submit CON data to DDBJ via Mass Submission System (MSS).

Sample flat file of CON data

LOCUS       BA001000            5631 bp    DNA     linear   CON 06-DEC-2008
DEFINITION  Homo sapiens DNA, chromosome 7, scaffold: ASE1.
ACCESSION   BA001000 BZZZ01000000
VERSION     BA001000.1
DBLINK      BioProject:PRJDA12345
KEYWORDS    WGS.
SOURCE      Homo sapiens (human)
  ORGANISM  Homo sapiens
            Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
            Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini;
            Catarrhini; Hominidae; Homo.
REFERENCE   1  (bases 1 to 5631)
  AUTHORS   Mishima,H. and Shizuoka,T.
  TITLE     Direct Submission
  JOURNAL   Submitted (01-APR-2003) to the DDBJ/EMBL/GenBank databases.
            Contact:Hanako Mishima
            National Institute of Genetics, DNA Data Bank of Japan; Yata 1111,
            Mishima, Shizuoka 411-8540, Japan
REFERENCE   2
  AUTHORS   Mishima,H., Shizuoka,T. and Fuji,I.
  TITLE     Human WGS scaffold CON
  JOURNAL   Unpublished (2003)
COMMENT     Whole genome shotgun sequencing project.
            Please visit our web site
            URL:http://www.ddbj.nig.ac.jp/
FEATURES             Location/Qualifiers
     source          1..5631
                     /db_xref="taxon:9606"
                     /mol_type="genomic DNA"
                     /note="scaffold: ASE1"
                     /organism="Homo sapiens"
     assembly_gap    1346..2845
                     /estimated_length=1500
                     /gap_type="within scaffold"
                     /linkage_evidence="paired-ends"
     assembly_gap    4302..4401
                     /estimated_length=unknown
                     /gap_type="within scaffold"
                     /linkage_evidence="align trnscpt"
CONTIG      join(BZZZ01123456.1:1..1345,gap(1500),BZZZ01123457.1:1..1456,
            gap(unk100),complement(BZZZ01123458.1:1..1230))
//