For a sequence similarity search, enter:
• a protein or nucleotide sequence
• a UniProt identifier, e.g.
   P00750 or A4_HUMAN or UPI0000000001
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To align several protein sequences, enter:
• two or more sequences in FASTA format
• two or more UniProt identifiers, e.g.:
   TPA_HUMAN
   TPA_PIG
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Enter or upload a list of UniProt identifiers
to download the corresponding entries, e.g.
P00750
A4_HUMAN
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To map identifiers to or from UniProtKB:
• enter identifiers, e.g. 1TTA 1FNS
• select a source database, e.g. PDB
• select a target database, e.g. UniProtKB
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