Yeast transcription factor IIIC (TFIIIC) is a multi-subunit protein complex that interacts with two control elements of class III promoters called the A and B blocks. This family represents the subunit within TFIIIC involved in B-block binding [1].

1: TFC3: gene encoding the B-block binding subunit of the yeast transcription factor IIIC. Lefebvre O, Carles C, Conesa C, Swanson RN, Bouet F, Riva M, Sentenac A; Proc Natl Acad Sci U S A 1992;89:10512-10516. PMID:1279682