Introduction The PPZPMs are a collection of 24 somewhat ill-defined cyclic lipodepsipeptides. They are produced by Pseudomonas sp. Wu6 (GenBank JAFLXH010000000), a strain isolated from the hyphae of the phytopathogenic oomycete Phytophthora alni sp. alni. Since they are composed of 10 amino acids, 8 of which form a macrocycle by means of an ester bond, they [...]