Paste your protein or nucleotide FASTA sequence(s) into the text area below.
Sample FASTA sequence: Example hCoV-19 genome
upload your protein or nucleotide sequences in a FASTA file
The server can
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:
Automatic detection of closest reference
(estimated time needed: ~10 seconds per sequence in automatic mode)
Developed by A*STAR Bioinformatics Institute (