surfactin
surfactin
Any mixture comprising isoforms of a bacterial cyclic lipopeptide antibiotic produced by various strains of <em>Bacillus subtilis</em>. The isoforms are cyclodepsipeptides containing at least seven amino acid residues. Among the most effective biosurfactants, surfactin can reduce the surface tension of water from 72 to 27 mN/m at a concentration as low as 0.005%.