E From left to right: Phase contrast and GFP representation in 2a2iL-RH6-eGFP; presence of injected 2a2iL-RH6-eGFP in the mouse blastocyst and integration into the inner cell mass (ICM) after 3, 24 and 48 h incubation periods. Scale bars: 200, 100, and 50 µm in the inset. 