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In FACS analyses, EPCs cultured for 15 days were positive for CD34 ((b), 52.73%), VEGFR2 ((c), 61.63%), CD133 ((e), 14.28%), and the mature endothelial-specific marker CD31 ((f), 3.26%). Isotype controls were used in the FACS analyses ((a), (d)). A bar graph (g) showed that the positive rate of CD34, VEGFR2, CD133, and CD31. After being cultured for 30 days, the EPCs were positive for CD34 ((h), 15.65%).
