Ni, Wei, Shengwei Hu, Wureli Hazi, Yuanzhi Wang, Jun Qiao, Ren Yan, and Chuangfu Chen. 2012. “Sheep 7SK Promoter for Short Hairpin RNA Expression”. Electronic Journal of Biotechnology 15 (2). Valparaíso, Chile. https://preprints.pucv.cl/index.php/ejbiotechnology/article/view/v15n2-10.