MPO and colitis: While injected twice with 50 μg rSjcystatin after colitis, mice showed a significantly lower levels of MPO (0.59 ± 0.23) U/g, MAO (4.71 ± 1.11), MIO (3.50 ± 0.55), DAI (4.80 ± 0.84) and less colon shrinkage than the untreated colitis mice (Figs. 2, 3).