TAFII25 binds to TAFII259 and inhibits its acetyltransferase activity and the exact role of TAFII25 is currently uknown but studies have shown that it interacts with the C-jun pathway (a protein that in humans is encoded by the JUN gene).
TAFII55 binds to TAFII250 and inhibits its acetyltransferase activity. The exact role of TAFII55 is currently unknown but studies have shown that it interacts with the C-jun pathway. c-Jun is a protein that in humans is encoded by the JUN gene. 
