Catalase is a common enzyme found in nearly all living organisms exposed to oxygen.

Catalase is a tetramer of four polypeptide chains, each over 500 amino acids long .< ref name = Boon_a > It contains four porphyrin heme ( iron ) groups that allow the enzyme to react with the hydrogen peroxide.

Catalase was first noticed in 1818 when Louis Jacques Thénard, who discovered H < sub > 2 </ sub > O < sub > 2 </ sub > ( hydrogen peroxide ), suggested its breakdown is caused by an unknown substance.

Catalase is also universal among plants, and many fungi are also high producers of the enzyme.

Catalase is used in the food industry for removing hydrogen peroxide from milk prior to cheese production.

Catalase is also used in the textile industry, removing hydrogen peroxide from fabrics to make sure the material is peroxide-free.

Catalase is an enzyme that catalyzes the breakdown of hydrogen peroxide in many organisms.

Catalase, which is concentrated in peroxisomes located next to mitochondria, reacts with the hydrogen peroxide to catalyze the formation of water and oxygen.

Catalase reactions vary among Enterobacteriaceae.

* Catalase test on nutrient agar tests for the production of catalase enzyme, which splits hydrogen peroxide and releases oxygen gas.

Catalase can also catalyze the oxidation, by hydrogen peroxide, of various metabolites and toxins, including formaldehyde, formic acid, phenols, acetaldehyde and alcohols.

Catalase contributes to ethanol metabolism in the body after ingestion of alcohol, but it only breaks down a small fraction of the alcohol in the body.

Catalase has been shown to interact with the ABL2 and Abl genes.

USML-2 Experiments included: the Surface Tension Driven Convection Experiment ( STDCE ), the Drop Physics Module, the Drop Dynamics Experiment ; the Science and Technology of Surface-Controlled Phenomena experiment ; the Geophysical Fluid Flow Cell Experiment ; the Crystal Growth Furnace, the Orbital Processing of High Quality Cadmium Zinc Telluride Compound Semiconductors experiment ; the Study of Dopant Segregation Behavior During the Crystal Growth of Gallium Arsenide ( GaAs ) in Microgravity experiment ; the Crystal Growth of Selected II-VI Semiconducting Alloys by Directional Solidification experiment ; the Vapor Transport Crystal Growth of Mercury Cadmium Tellurida in Microgravity experiment ; the Zeolite Crystal Growth Furnace ( ZCG ), the Interface Configuration Experiment ( ICE ), the Oscillatory Thermocapillary Flow Experiment ; the Fiber Supported Droplet Combustion Experiment ; the Particle Dispersion Experiment ; the Single-Locker Protein Crystal Growth experiment ; ( including the Protein Crystallization Apparatus for Microgravity ( PCAM ) and the Diffusion-controlled Crystallization Apparatus for Microgravity ( DCAM )); the Crystal Growth by Liquid-Liquid Diffusion, the Commercial Protein Crystal Growth experiment ; the Advanced Protein Crystallization Facility, Crystallization of Apocrystacyanin C experiment ; Crystal Structure Analysis of the Bacteriophage Lambda Lysozyme, Crystallization of RNA Molecules Under Microgravity Conditions experiment ; Crystallization of the Protein Grb2 and Triclinic Lysozyme experiment ; Microgravity Crystallization of Thermophilic Aspartyl-tRNA Synthetase and Thaumatin experiment ; Crystallization in a Microgravity Environment of CcdB experiment ; A Multivariate Analysis of X-ray Diffraction Data Obtained from Glutathione S Transferase experiment ; Protein Crystal Growth: Light-driven Charge Translocation Through Bacteriorhodopsin experiment ; Crystallization of Ribosome experiment ; Crystallization of Sulfolobus Solfataricus Alcohol Dehydrogenase experiment ; Crystallization of Turnip Yellow Mosaic Virus, Tomato Aspermy Virus, Satellite Panicum Mosaic Virus, Canavalin, Beef Liver Catalase, Concanavalin B experiment ; Crystallization of the Epidermal Growth Factor ( EGF ); Structure of the Membrane-Embedded Protein Complex Photosystem I ; Crystallization of Visual Pigment Rhodopsin ; Commercial Generic Bioprocessing Apparatus ; Astroculture Facility and Experiment.

Catalase and superoxide dismutase ameliorate the damaging effects of hydrogen peroxide and superoxide by converting these compounds into oxygen and water, benign molecules.

The word `` mimesis '' ( `` imitation '' ) is usually associated with Plato and Aristotle.

The party is usually in a room small enough so that all guests are within sight and hearing of one another.

It will readily be seen that in this suggested network ( not materially different from some of the networks in vogue today ) greater emphasis on monitoring is implied than is usually put into practice.

One is so accustomed to think of men as the privileged who need but ask and receive, and women as submissive and yielding, that our sympathies are usually enlisted on the side of the man whose love is not returned, and we condemn the woman as a coquette.

usually, this is most exasperating to men, who expect every woman to verify their preconceived notions concerning her sex, and when she does not, immediately condemn her as eccentric and unwomanly.

What evidence is available would seem to indicate that Brooks, unlike his older brother Henry, had most of the methodological vices usually found in the amateur.

He is usually something of an underdog, he must battle the organized police force as well as recognized criminals.

he usually draws some kind of comparison with the jazz tradition and the poem he is reading -- for instance, he draws the parallel between a poem he reads about an Oriental courtesan waiting for the man she loves, and who never comes, and the old blues chants of Ma Rainy and other Negro singers -- but usually the comparison is specious.

This is a common symptom and the cause usually is pressure on the nerve leading to the affected hand.

if the Government certifies that production may be possible from the property, the royalty obligation continues for the 10-year period usually specified in the contract or until the Government's contribution is repaid with interest.

These roads are largely of less than highway standards, and usually carry traffic which is related to use of the National Forests.

April 15 is usually the final date for filing income tax returns for most people because they use the calendar year ending on December 31.

Much of this necessary increase in research and development, though properly chargeable to current expenses, is not reflected in earnings until projects are completed and the new machines sold in quantity, usually over a period of several years.

Sometimes it is necessary to roughly calculate the square inch area of the opening but the calculation can usually be made with sufficient accuracy that it won't affect the final computation.

Enough daylight is usually available from the windows, but if you have synchronized flash -- use it.

The size of the press is usually expressed in terms of chuck capacity ( the maximum diameter tool shank it will hold ) or distance between the spindle center and the column.

We know now that a 15-degree differential in temperature is the maximum usually desirable, and accurate controls assure the comfort we want.

It is usually helpful to make a sketch map in the field, showing the size and location of the features of interest and to take photographs at the site.

A body of water is usually the center of interest at parks which attract the greatest picnic and camping use.

Experience is not seen, as it is in classical rationalism, as presenting us initially with clear and distinct objects simply located in space and registering their character, movements, and changes on the tabula rasa of an uninvolved intellect.

The speed is controlled by pressing on the two brake buttons located where the index finger and thumb are placed when holding the motor.

The school is located at 9-1/2 Mile Road, Woodward Heights.

When suitable equipment is located by the SBA representative, the small business concern is contacted and advised on when, where, and how to bid on such property.

Eighteen voted for assessment by the town in which it is located and eleven preferred assessment by the town in which the owner resides.

This temporary Peace Corps is being established under existing authority in the Mutual Security Act and will be located in the Department of State.

That's because the good professor teaches only Weider methods at his famous Montreal Health Studio which is located at 1821 Mt. Royal East in Montreal.

As an engineer approaches the plant the position of the home signal is seen in advance when he passes the `` distant '' signal located beyond the limits of the interlocking plant.

Placement of these holes is not critical, but they should be located so that the centers are about 1/8'' '' from any edge.

In California is located one of the most popular of the national parks -- Yosemite.

If your pool is located on or near sloping ground, it may have natural drainage which is certainly more desirable than to be faced with the annual expense and labor of first pumping out the water and then scooping out all the debris.

The cooling coil is located in the furnace's outlet.

For example, the officials of Poughkeepsie town ( township ) where the project is located think highly of it because it simplifies their snow clearing problem.

In most states, trade and industrial training is provided in a minority of the high schools, usually located in the larger cities.

After being located for some years in the Village at the Equinox Pharmacy under the supervision of Mrs. Harry Mercier, it is presently located in the Hill and Dale Shop, Manchester Center.

It is hard to believe that this mass of intertwined concrete constitutes what the law calls `` the highest and best use '' of centrally located urban land.

One fin is located every 120-degrees around the inside diameter of the wheel.

and only rarely is he acutely concerned with the meaning of what he has located.

Ideally these schools should be so located that one or more should be in the area where demand for practical courses is at the highest.

Action located where the evil is concentrated will prove most decisive and is most clearly legitimate.