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(A) 18F-FHBG retention in the form of %ID/g by measuring ROIs in organs of liver and in U87MG and MDA-MB-435 tumors after transfection of unmodified and modified Ad vectors. Data are presented as average ± SD (n = 3). Dose of virus was normalized to 20-g mouse body weight. (B) Percent conversion of 3H-PCV in tissue lysates from mice after 48 h of exposure to Adtk and RGD-PEG-Adtk. *P < 0.001.
