Programmable nucleases, ZFN, TALEN and RGENs enable
gene knockout in cultured cells and organisms by producing site - specific DNA double - strand breaks, whose repair via error - prone non-homologous end joining (NHEJ) or microhomology -
mediated end joining (MMEJ) gives rise to frameshift mutations.
Here, we report that CRISPR / Cas9
mediated approach can efficiently induce monoallelic and biallelic
gene knockout in goat primary fibroblasts.