The produced toxin, which could be adsorbed by activated charcoal and be fully extracted by methanol from its culture liquid, was not a kind of protein material.

Proteins are amphiphilic molecules with affinity to material surfaces, thus are easily adsorbed on material surfaces and cause biofouling.

Water extracts were adsorbed with F2D resin and then eluted by 15-fold 70% alcohol of the material.