You can enter:
• a protein or nucleotide sequence
• a valid UniProt identifier, for example:
   P00750 or A4_HUMAN or UPI0000000001
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Enter either:
• two or more sequences in FASTA format
• two or more UniProt identifiers, for example:
   P00750 P00750-2 UniRef100_P00750
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Enter or upload a list of UniProt identifiers
to download corresponding entries, for example:
P00750 A4_HUMAN
UniRef100_P00750
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To map identifiers to or from UniProtKB:
• enter identifiers, e.g.: 1TTA 1FNS
• select a source database, e.g.: PDB
• or select a target database, e.g.: UniProtKB
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