Molecular Cloning and Expression of Dihydroflavonol 4-reductase Gene inTuber Organs of Purple-fleshed Potatoes Kang, W.-jin; Lee, Y.-hwa; Kim, H.-soon; Jeon, J.-heung; Joung, H. Journal of Biological Chemistry 493: 75-81 2006 0021-9258 https://eurekamag.com/research/066/141/066141803.php