Tgfb1, Tgfb2, and Tgfb3 mRNA expression in ascending thoracic aortas taken from Tgfb1+/− (n=3), Tgfb2+/− (n=4), and Tgfb3+/− (n=4), mice and their wild-type (WT) controls (n=3 each). All expression levels are relative to the B2m housekeeping gene. * Denotes statistical significance between heterozygotes and their WT controls at p<0.05.