A. Agarose gel (1.8%) analysis of RT-PCR products, human CD39/NTPDase and rat β-actin, obtained from mRNA isolated from control (1, 2) and Ad-CD39-transduced (3, 4) rat aortas. 5 – negative control; 6 – positive control (human umbilical vein EC); 1 – 100-base pair ladder. B. Immunohistochemistry of control (a) and Ad-CD39-transduced aortas (b, c) using antibody to human CD39. Magnification 200× (a, b) and 400× (c). Results represent stainings of at least 2 aortas.