World's Smallest Transcription Factor

[gc]

I'm trying to find out how many small transcription factors have been
characterized, but that's a tough thing to do a lit search on.  I'm
looking for any transcription factors that people know of smaller than
say thirty kilodaltons.
The person with the smallest transcription factor gets a plaque with
his/her name on it the size of their transcription factor.

-- 
--gc