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Reporter embryonic stem cell (ESC) lines with tissue-specific reporter genes may contribute to optimizing the differentiation conditions in vitro as well as trafficking transplanted cells in vivo. To optimize and monitor endothelial cell (EC) differentiation specifically, here we targeted the enhanced green fluorescent protein (EGFP) reporter gene at the junction of 5'UTR and exon2 of the endothelial specific marker gene CD144 using TALENs in human ESCs (H9) to generate a EGFP-CD144-reporter ESC line. The reporter cells expressed EGFP and CD144 increasingly and specifically without unexpected effects during the EC differentiation. The EC differentiation protocol was optimized and applied to EC differentiation from hiPSCs, resulting in an efficient and simplified endothelial differentiation approach. Here we created our own optimized and robust protocol for EC differentiation of hESCs and hiPSCs by generating the lineage- specific site- specific integration reporter cell lines, showing great potential to be applied in the fields such as trafficking gene and cell fate in vivo in preclinical animal models. [ABSTRACT FROM AUTHOR]