5.1.1.4	-20°C, 50% glycerol or diluted in sodium acetate buffer, pH 6.0, activity is impaired	
5.1.1.4	-20°C, 50% glycerol or diluted in sodium acetate buffer, pH 6.0, stable	
5.1.1.4	-20°C, as ammonium sulfate precipitate, stable	
5.1.1.4	23°C, 0.5 M imidazole buffer, pH 8.0, 10 days, TcPRACA loses 84% of its activity	
5.1.1.4	23°C, 0.5 M imidazole buffer, pH 8.0, 10 days, TcPRACB is stable, TcPRACA loses 84% of its activity	
5.1.1.4	stored 6 months in the refrigerator without significant loss of activity