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Adenoviral mediated expression of Flk1 increases LTR staining in the cardiac OFT. LTR staining in chicken hearts transduced with AdFlk1 (B, D) is significantly higher than that in control hearts (A, C) at stage 25 (A and B) and 30. Arrow indicated LTR positive cells. (E) Number of LTR particles in the OFT in whole mount as quantified Image J. *** P<0.001 compared to control group.
