Resources:
Retroviruses
Reference sets:
Retroviruses
Hepatitis B
Hepatitis C
Poliovirus
Download list of reference sets
Help
Tools:
Genotyping
External links:
Division of AIDS at NIAID
LANL HIV Sequence Database
Stanford HIV RT and Protease Gene Database
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Important UpdateAs of February 2025, NCBI's Viral Genotyping Tool will no longer be available. For up-to-date virus sequence data and analysis tools, please visit NCBI Virus: https://www.ncbi.nlm.nih.gov/labs/virus.
    This tool helps identify the genotype of a viral sequence. A window is slid
along the query sequence and each window is compared by BLAST to each of the
reference sequences for a particular virus. This approach is especially useful
for the analysis of recombinant sequences.
  (Try an example).
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