NCBI Fetch Tab

Live search against the NCBI Assembly database — type an organism name, filter by RefSeq / GenBank / assembly level, and download the genome FASTA and GFF3 in one click.

Search strategies

  1. RefSeq first (GCF_-prefixed, annotated) — preferred for downstream annotation work.

  2. GenBank fallback (GCA_) if no RefSeq hit exists.

  3. Taxonomy-only — if the user knows a Taxonomy ID, skips assembly search entirely.

Outputs

Files land in ~/CisGS-Workspace/<organism>/ with the assembly accession in the filename:

  • GCF_000004515.6_<asm_name>_genomic.fna

  • GCF_000004515.6_<asm_name>_genomic.gff

A status panel shows progress and any retries.

Note

First-time users must set an NCBI email under Settings → Set NCBI Email. Entrez rejects requests without one.