| This context dependent physiological interaction probably corresponds to the existence of a direct interaction between Hoxa 5 and FKHR and FoxA2 / HNF3beta , as demonstrated by pull down experiments achieved either in vitro or after cellular co expression . 0.52892315^^^ In HuF cells , Hoxa 5 cooperates with FKHR to dramatically enhance IGFBP 1 promoter activity . 0.50098195^^^ |