. "Heterotrimeric transcription factor composed of three components, NF-YA, NF-YB and NF-YC. NF-YB and NF-YC must interact and dimerize for NF-YA association and DNA binding (By similarity). Interacts with SP1; the interaction is inhibited by glycosylation of SP1. Interacts (via N-terminus) with ZHX2 (via homeobox domain). Interacts with ZFX3. Interacts with ZHX1 (By similarity)." .