This is the second winged helix domain can be found in TFA2 proteins present in Saccharomyces cerevisiae. In form 2, the domain interacts directly with Rad3, a DNA helicase [1].

1: Structure of an RNA polymerase II preinitiation complex. Murakami K, Tsai KL, Kalisman N, Bushnell DA, Asturias FJ, Kornberg RD; Proc Natl Acad Sci U S A. 2015;112:13543-13548. PMID:26483468