In the case of a few strains, duplicates result from structural studies, where secondary or tertiary structural information changes while the sequence does not. All structural records are accessible by clickable links. Occasionally, two or more nucleotide records refer to the same strain and contain identical sequences. These frequently arise from updating an earlier record in GenBank. If the records are not updates, but were generated by different authors, and deposited at different times, we classify the earliest deposit into GenBank as the primary record.
All duplicate records are accessible by clickable links.
Another source of duplicate record is the resequencing of a gene that was originally only partially sequenced, with more extensive coverage of the gene by the later sequencing effort. Enter a search term. Select the search mode. Searches are case-insensitive. Spaces count as characters.