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An enzyme that catalyzes the degradation of urea to ammonia and carbon dioxide; obtained from the seed of jack bean.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(carbamide amidohydrolase), an enzyme of the hydrolase class that catalyzes the breakdown of urea into ammonia and carbon dioxide. It is found in many bacteria and fungi and in some invertebrates, but is especially abundant in the seeds of such legumes as soybeans and jack beans. Urobacteria contain active urease. Urease was the first enzyme prepared in the crystalline state, by J. Sumner (1926). It is used for the quantitative determination of urea because of its high specificity.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
[12.] Tariq SA (2011) Urease inhibitors from Indigoferagerardiana Wall.
Organic fertilization can increase [beta]-glucosidase, an enzyme that catalyzes the hydrolysis and biodegradation of various [[beta]-glucosidases found in the organic matter (Turner et al., 2002), and urease activity (Chakrabarti et al., 2000, Chang et al., 2007).
renale contains the enzyme urease (Timoney et al., 1988).
The main reason of these losses is the immediate increase in pH and NH4+ concentration around the fertilizer micro site due to the activity of enzyme urease (Ahmed et al., 2008; Mohsina et al., 2004).When urea is applied to the soil, the soil pH and urea concentration increases immediately on the fertilizer microsite and urease enzymes start their activity to hydrolyse the applied urea (Krajewska, 2009).
Detection of Helicobacter pylori: a faster urease test can save resources.
Rhizospheric urease activity of both genotypes was affected by the genotype and endophyte infection (Table 1).
Reaction mixtures comprising 25 [micro]l of enzyme (Jack bean urease) solution and 55 [micro]l of buffers containing 100 mM urea were incubated with 5 [micro]l of test compounds (each 0.5 mM) at 30 [degrees]C for 15 min in 96-well plates.
The soil enzymes activities (urease, phosphatase, saccharase, and catalase) of CT, DT, and DNT treatments in loam and clay were shown in Figures 4, 5, 6, and 7.
Wilson, "Cutting edge: urease release by Helicobacter pylori stimulates macrophage inducible nitric oxide synthase," Journal of Immunology, vol.
Being involved in the pathophysiology of multiple human and animal disorders, targeting urease for treating pathogenic disorders caused by urease-producing bacteria has already opened a new line of treatment for infections caused by such bacteria.
The activity of soil urease (EC was determined in dry samples according to the Hofmann & Schmidt (1953) method and that of saccharase (invertase) (EC according to the Hofmann & Seegerer (1950) method (both methods cited in and modified by Chunderova, 1973).
One sample was used for the rapid urease test (Pronto Dry), the second for aerobic and anaerobic culture, and the third for histopathologic evaluation.