A method for the stabilization of nitrilase activity of unimmobilized or immobilized microbial cells has been developed. The unimmobilized or immobilized microbial cells are stored in an aqueous solution containing from 0.100 M to the saturation concentration of an inorganic salt of bicarbonate or carbonate, including ammonium, sodium and potassium salts of bicarbonate or carbonate. Aqueous suspensions containing at least 100 mM bicarbonate or carbonate limit microbial contamination of the stored enzyme catalyst, as well as stabilize the desired nitrilase activity of the unimmobilized or immobilized cells. Microorganisms which are characterized by an nitrilase activity and are stabilized and preserved by this method include Acidovorax facilis 72-PF-15 (ATCC 55747), Acidovorax facilis 72-PF-17 (ATCC 55745), and Acidovorax facilis 72W (ATCC 55746).

Um método para a estabilização da atividade do nitrilase de unimmobilized ou immobilized pilhas microbial foi tornado. Unimmobilized ou immobilized pilhas microbial são armazenados em uma solução aqueous que contem de 0.100 M à concentração do saturation de um sal inorgánico do bicarbonato ou do carbonato, including sais do ammonium, do sodium e do potassium do bicarbonato ou do carbonato. As suspensões aqueous que contêm a contaminação microbial do limite ao menos de 100 milímetros do bicarbonato ou do carbonato do catalizador armazenado do enzyme, assim como estabilizam a atividade desejada do nitrilase do unimmobilized ou immobilized pilhas. Os microorganisms que são caracterizados por uma atividade do nitrilase e estabilizados e preservados por este método incluem os facilis 72-PF-15 de Acidovorax (ATCC 55747), os facilis 72-PF-17 de Acidovorax (ATCC 55745), e os facilis 72W de Acidovorax (ATCC 55746).

 
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