Figure 3. 786-O tumor sections from animals in the biodistribution study.

Frozen tumor sections were prepared seven days after dose administration and analyzed for microvessel density (A), CD70-expression (B) and autoradiography (C) and (D). Alpha-tracks in “star-like formations” were observed in tumor sections treated with CD70-TTC (C), but not in tumors treated with isotype control-TTC (D).