Merck, 1084890025, Urease

Lyophilized urease is an enzyme preparation for biochemical analysis and laboratory experiments involving urea hydrolysis. Urease catalyzes the conversion of urea and water into ammonia and carbon dioxide, producing a measurable change in chemical composition that can be coupled to suitable analytical detection reactions. This 25 g presentation has a designated activity grade of 5 U/mg and is supplied as a dry, lyophilized material. The enzyme can be used in method development, reference assays and reaction-system studies where controlled urease activity is required. Select the buffer, temperature and substrate concentration for the assay rather than assuming reaction rate remains constant under all conditions. Minimize unnecessary exposure to heat, moisture and inappropriate solution conditions during handling. Reconstituted working solutions should be prepared with attention to activity stability and the intended assay window. This is a research enzyme reagent, not clinical-grade medication or a finished urea-testing instrument.