The transgene contains a lentiviral vector containing the monomeric red fluorescent protein, mCherry, under the control of the human ubiqutin C promoter. Line 1 was generated. The integration site of the UbC-mCherry cassette was detected at 6qA3.1 within intron 5, disrupting the Ing3 locus by uncharacterized mechanisms. (J:177977, J:287259)