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What is in the NCBI chromosome nucleotide database vs nt/refseq_genomic?

What kind of sequences are in the NCBI chromosome database compared to nt or refseq? The definition on the blast page for the chromosome one is unclear to me.

Thanks

ncbi databases blast
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updated by Ram Ram • written by lauraeiv • lauraeiv

Maybe it's only fully sequenced molecules? You could email them and ask..

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written by 5heikki 5heikki

1 answer

The databases are described in this NCBI guide.

How to BLAST guide (Table 2)

Database    Type         Content
                         All GenBank + EMBL + DDBJ + PDB sequences,
nr (nt)     Nucleotide   excluding sequences from PAT, EST,
                         STS, GSS, WGS, TSA and phase 0,
                         1 or 2 HTGS sequences, mostly non‐redundant.

chromosome  Nucleotide   Complete genomes and complete chromosomes from the NCBI Reference Sequence project.
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updated by Ram Ram • written by Siva Siva

Quite a fun place to hide such information. Too bad now they're exposed and the almighty Google will know.

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written by 5heikki 5heikki

Excellent thank you, very sneaky alright!

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written by lauraeiv • lauraeiv

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