Figure 2
From: Resistance of rumen bacteria murein to bovine gastric lysozyme
Muramidase activity of gastric extract on Echerichia coli purified murein. Muropeptide profile after digestion of murein with gastric extract (500 μg/ml, a) or with the fungal muramidase cellosyl (50 ug/ml, b). Cellosyl produced a tetrapeptide at 27 min corresponding to M4 (having R1 = D-Ala and R2 = -H). This was further digested by gastric extract (500 ug/ml, c) but not by cellosyl (50 ug/ml, d).