Cyclopeptide antibiotic that inhibits the growth of Gram-positive bacteria, but has no effect on the growth of Gram-negative bacteria. Stable from pH 2 to 12. Displays a high degree of stability when incubated at temperatures between -80 and 75 degrees Celsius for 60 minutes. Autoclaving the peptide at 121 degrees Celsius for 15 minutes had no effect but incubation at 100 degrees Celsius for 60 minutes caused a 32-fold reduction in activity.