A database like Genbank is said to be a nonreductive database. What does that mean ?

  • $\begingroup$ Can you please provide a citation and link to the resource which uses this term? Google doesn't appear to believe that "nonreductive database" is a real phrase. $\endgroup$
    – Sycorax
    Mar 4, 2014 at 16:31
  • $\begingroup$ @user777 d396qusza40orc.cloudfront.net/… Read the first line. There, the nr stands for nonreductive database(As told by the instructor) $\endgroup$
    – lalal
    Mar 4, 2014 at 16:40

1 Answer 1


If your instructor told you that I think they are wrong.

This link http://blast.ncbi.nlm.nih.gov/Blast.cgi?CMD=Web&PAGE_TYPE=BlastDocs&DOC_TYPE=ProgSelectionGuide at Table 2.1 has:

nr Non-redundant GenBank CDS translations + PDB + SwissProt + PIR + PRF, excluding those in env_nr.

suggesting that nr meand Non-redundant, not nonreductive.


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