Paste your protein or nucleotide FASTA sequence(s) into the text area below.
(Sample FASTA sequence: Example hCoV-19 genome)
 
   
  OR upload your protein or nucleotide sequences in a FASTA file
 
   
  The server can automatically determine the type of input (either protein or nucleotide) and the closest reference sequence among current strains to compare.

To compare with more remotely related sequences/strains, it is possible to select a specific reference strain by choosing below.
   
  GISAID reference strain:
   
   (Sequence Quality Checker. Estimated time needed: <1 seconds per sequence)
   (Complete Analysis. Estimated time needed: ~10 seconds per sequence)
 
   
  Please take a look at the Frequently Asked Questions if you are new to CoVsurver.
Developed by A*STAR Bioinformatics Institute (BII), Singapore