The homeodomain of PDX-1 mediates multiple protein-protein interactions in the formation of a transcriptional activation complex on the insulin promoter Ohneda, K.; Mirmira, R.G.; Wang, J.; Johnson, J.D.; German, M.S. Molecular and Cellular Biology 20(3): 900-911 2000 https://eurekamag.com/research/011/512/011512426.php