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tyrosine sulfation/FASTA

Meh, David dmeh at bcsew.edu
Fri Aug 20 08:35:00 EST 1999

I'm trying to model a peptide which contains sulfated tyrosine residues to a
known crystal structure from the PDB using Swiss PDB Viewer. I can get an
okay fit, but my sequence remains unsulfated in the model and I'm sure the
fit would be better if it were sulfated. The peptide sequence is imported as
a FASTA code with only single letter abbreviation. Is there a single letter
code for Y-SO3, or can I edit the Swiss PDB viewer to incorporate the
Thanks for your help,

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