an emulsifying agent of microbiological origin is produced by an aerobic aqueous fermentation process employing corynebacterium hydrocarboclastus uwo 409 as the fermentation agent and paraffinic hydrocarbon substrate . an emulsifying agent product consists essentially of an extracellular polymer product of a fermentation process , the polymer comprising a polysaccharide component including galactose , glucose and mannose in ratio about 1 : 2 . 65 : 1 . 96 and a bound protein component .