Has antibacterial activity against a wide spectrum of Gram-positive and Gram-negative bacteria, including L.monocytogenes which is inhibited through disruption of the cell membrane. The antimicrobial activity of BAC79 was completely lost after treatment with enzymes trypsin, pepsin, proteinase-K, and carboxypeptidase, while there was no loss of activity with either amylase or lipase. Optimum pH is between 2 to 4. Active from pH 2 to 6. Thermostable. Retains activity up to 100 degrees Celsius, and when exposed to 121 degrees Celsius. Also retains activity after storage at 4 degrees Celsius for 4 months.