RefSeq Expert Database

RefSeq (NCBI Reference Sequence Database) is a comprehensive, integrated, non-redundant, well-annotated set of reference sequences.


  • 59,683 distinct sequences from 13,138 organisms contributed to RNAcentral
  • the shortest sequence has 15 nucleotides, the longest 91,671
  • the average length is 256 nucleotides
  • database version: 65

Example entries

URS000075A3E5, URS000075ADFF, URS00003A96B7

Browse all RefSeq sequences



RefSeq: an update on mammalian reference sequences..
Pruitt K.D., Brown G.R., Hiatt S.M., Thibaud-Nissen F., Astashyn A., Ermolaeva O., Farrell C.M., Hart J., Landrum M.J., McGarvey K.M. et al. Nucleic Acids Res. 2014 Jan;42(Database issue):D756-63

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