Fig. 3

The representative radiochemical purity and cell uptakes of ^99mTc-TEx-Cy7/ ^99mTc-AEx-Cy7. a The representative radiochemical purity of ^99mTc-TEx-Cy7. b The representative radiochemical purity of ^99mTc-AEx-Cy7 c The serum stability of ^99mTc-TEx-Cy7 at 6 h. d, e The HCT116 cell and adipose stem cell viability after incubation with ^99mTc-TEx-Cy7 and ^99mTc-AEx-Cy7 at different time points. f Uptakes of ^99mTc-TEx-Cy7 and ^99mTc-AEx-Cy7 in HCT116 tumor cells at the indicated time points. Bars represent means ± SD (n = 3)