A: graph representing the appropriate protein bands of pro-matrix metalloproteinase (MMP)-2 and MMP-2 by zymography. STD, standard. B: semiquantitative analysis performed on days 3, 7, and 14. The normalized density of pro-MMP-2 and active MMP-2 at the vein-to-graft anastomosis was significantly higher than the control veins by days 7 and 14. *Significantly higher value (P < 0.05). Data are means ± SD. C: graph representing the appropriate protein band of pro-MMP-9 by zymography. D: semiquantitative analysis performed on days 3, 7, and 14. The normalized density of pro-MMP-9 was significantly higher (*) at all time points compared with the control vein. E: graph representing the appropriate protein band of tissue inhibitor of matrix metalloproteinase (TIMP)-1 by Western blot analysis. F: graph representing the appropriate band for β-actin from Western blot analysis for protein loading. G: semiquantitative analysis performed on days 3, 7, and 14. The normalized density of TIMP-1 was significantly higher on day 14 compared with the control vein. *Significantly higher value (P < 0.05).