-  Fork head / winged helix factors
-  Class
-  CLASSLINK:http\://www.edgar-wingender.de/class 3.3.html
-  "TRANSFAC® class description C0023: Identified by homology between HNF-3A and fkh. The domain comprises approx. 110 AA. Analysis of the crystal structure has revealed a compact structure of three alpha-helices, the third alpha-helix being exposed towards the major groove of the DNA. The domain also exerts minor groove contacts. Upon binding to DNA, it induces a bend of 13 degree."