Figure 2.

Molecular structure of the fluorescent probes based on FITC-conjugated cyclic RGD peptides (FITC-RGD2, FITC-3P-RGD2, and FITC-Galacto-RGD2). Adapted from Zheng et al. [49].

Molecular structure of the fluorescent probes based on FITC-conjugated cyclic RGD peptides (FITC-RGD2, FITC-3P-RGD2, and FITC-Galacto-RGD2). Adapted from Zheng et al. [49].