How to search the peptide sequence based on its ID - Peptide ID, sequence (Jan/16/2008 )

how to search a peptide sequence with its ID number?

for example, an antigen Peptide ID: P20171

thank you very much

Cathleen

why don't you google it? i'm sure i've read threads before about this issue....

taken from: http://ca.expasy.org/uniprot/P20171.fas

>P20171|RASH_RAT GTPase HRas - Rattus norvegicus (Rat).
MTEYKLVVVGAGGVGKSALTIQLIQNHFVDEYDPTIEDSYRKQVVIDGETCLLDILDTAG
QEEYSAMRDQYMRTGEGFLCVFAINNTKSFEDIHQYREQIKRVKDSDDVPMVLVGNKCDL
AARTVESRQAQDLARSYGIPYIETSAKTRQGVEDAFYTLVREIRQHKLRKLNPPDESGLG
CMSCKCVLS