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Yeast Two Hybrid False Positives

Anita Schwegmann anita at molbiol.uct.ac.za
Fri Oct 1 18:12:10 EST 1999

Hi there "two-hybrid" fellows

I have just screened a cDNA library for proteins that interact with my
bait (a transcription factor). A BLAST search of the DNA sequence 
revealed that the interacting protein is an extra-cellular matrix 
protein. I find this quite unlikely to occur naturally as an 
extra-cellular protein is unlikely to enter the nucleus. Has anyone 
else found these extra-cellular proteins to be false positives? 
Any help would be appreciated. 
Thanks, Anita

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