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note - FIZ Karlsruhe

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Protein sequences: switching off the low complexity filter<br />

Recall the Search Question (page 20)…<br />

Advanced similarity searching<br />

Find patent sequences with similarity to the Banana Bunchy Top Virus<br />

(BBTV) Replication Initiation Protein (NCBI: AAG44003):<br />

MSSFKWCFTLNYSSAAEREDFLALLKEEELNYAVVGDEVAPSSGQKHLQG<br />

YLSLKKSIKLGGLKKKYSSRAHWERARGSDEDNAKYCSKETLILELGFPA<br />

SQGSNRRKLSEMVSRSPERMRIEQPEIYHRYTSVKKLKKFKEEFVHPCLD<br />

RPWQIQLTEAIDEEPDDRSIIWVYGPNGNEGKSTYAKSLMKKDWFYTRGG<br />

KKENILFSYVDEGSEKHIVFDIPRCNQDYLNYDVIEALKDRVIESTKYKP<br />

IKLVELINIHVIVMANFMPEFCKISEDRIKIIYC<br />

Search Strategy<br />

To repeat a similarity search for protein sequences with BLAST<br />

without the low complexity filter...<br />

Step 1 Upload the sequence using STN Express<br />

Step 2 Conduct a BLAST search with the filter turned off<br />

Step 3 Sor the answers by descending similarity score<br />

Step 4 Review using a free-of-charge format with alignment<br />

Step 5 Display selected answers in a bibliographic format<br />

Upload the sequence query<br />

=> FILE DGENE<br />

FILE 'DGENE' ENTERED AT 17:50:22 ON 28 DEC 2010<br />

COPYRIGHT (C) 2010 THOMSON REUTERS<br />

=> UPL R BLAST<br />

Uploading C:\Documents and Settings\Rob Austin\Desktop\BBTV protein.txt<br />

UPLOAD SUCCESSFULLY COMPLETED<br />

L1 GENERATED<br />

See page 21 for instructions on how to<br />

upload the sequence query text file.<br />

GENESEQ on STN (DGENE) Workshop Manual | Page 63

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