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Image of direct injection of CRISPR/Cas9 system into presumable pig zygotes. (A) Microinjection of CRISPR/Cas9 system into developing embryo. The approach is simpler than somatic cell nuclear transfer. (B) CRISPR/Cas9 injected embryos at day 5 post fertilization, prior to embryo transfer. The scale bar indicates 100 μm.
