supported by grants from Ministry of Science and Technology of China(2011CBA01001,2012AA020503);the National Science Fund for Distinguished Young Scholars(31025016);the National Natural Science Foundation of China(31271577);Novel Agricultural Variety Breeding Project of Zhejiang Province(2012C12906-8);the Fundamental Research Funds for the Central Universities;the Key Construction Pro-gram of the National"985"Project(118000+193411801/006);the Research Fund for the Doctoral Program of Higher Education of China(20120101110089)
Genetically modified pigs are valuable models of human disease and donors of xenotransplanted organs.Conventional gene targeting in pig somatic cells is extremely inefficient.Zinc-finger nuclease(ZFN)technology has be...