IL-7 stain in coronary artery. Representative photos of IL-7 immuno-staining (reddish-brown) in the coronary arteries of control (A, N = 3), Sham (B, N = 3), and MI (C, N = 4) mice. Negative staining control (D) omitted the primary antibody. IL-7 stain area was measured and plotted (E). Scale bar = 0.01 mm. Bar over columns indicate statistical significance. Control vs MI p = 0.003; Sham vs MI p < 0.007.