FITC IgG1PE IgG1APC IgG1 CD31 CD44CD90 CD34 KDRCD11b c-kitCD133VE-cadherin 4.2%0.2%0.6% 0.7%1.0%0.2% 36.0%21.1%0.2% 1.1%0.7%0.2% Isotype IgG controls Supplemental.