NF-Y is a ubiquitously expressed heterodimeric transcription factor composed of three subunits (NF-YA, NF-YB and NF-YC). All three subunits are required for constitution of a functional binding complex to the CCAAT box. CCAAT boxes are found in the regulatory region of 30% of genes, including housekeeping genes as well as inducible and cell cycle-regulated genes. The role of a CCAAT box as a cis-acting promoter element depends on its ability to interact with NF-Y. Methods to measure overall levels and modifications of the NF-YA subunit are crucial to understanding transcriptional regulation of the numerous CCAAT box-containing genes. The TransAM NF-YA Kit contains an antibody specific for the active form of the NF-YA subunit when it is bound to the target DNA.


