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 usually located in a cellular, bipolar environment organelle called the peroxisome.

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

* Catalase, an enzyme

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

Catalase reactions vary among Enterobacteriaceae.

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.

Poetry in Persian life is far more than a common ground on which -- in a society deeply fissured by antagonisms -- all may stand.

Before merging them into a common profile it is well to remember that their separate careers were extraordinary.

This almost trivial example is nevertheless suggestive, for there are some elements in common between the antique fear that the days would get shorter and shorter and our present fear of war.

Harold Clurman is right to say that `` Waiting For Godot '' is a reflection ( he calls it a distorted reflection ) `` of the impasse and disarray of Europe's present politics, ethic, and common way of life ''.

However, it is important to trace the philosophy of the French Revolution to its sources to understand the common democratic origin of individualism and socialism and the influence of the latter on the former.

But it is the need to undertake these testaments that I would submit here as symptom of the common man's malaise.

As symptomatic of the common man's malaise, he is most significant: a liberal and a Catholic, elected by the skin of his teeth.

What is the common man's complaint??

But what a super-Herculean task it is to winnow anything of value from the mud-beplastered arguments used so freely, particularly since such common use is made of cliches and stereotypes, in themselves declarations of intellectual bankruptcy.

The men who speculate on these institutions have, for the most part, come to at least one common conclusion: that many of the great enterprises and associations around which our democracy is formed are in themselves autocratic in nature, and possessed of power which can be used to frustrate the citizen who is trying to assert his individuality in the modern world ''.

They all have this in common: the earth is situated near the center of the deferent.

But that one should superimpose all these charts, run a pin through the common point, and then scale each planetary deferent larger and smaller ( to keep the epicycles from ' bumping ' ), this is contrary to any intention Ptolemy ever expresses.

Now this concern for the freedom of other peoples is the intellectual and spiritual cement which has allied us with more than forty other nations in a common defense effort.

A common meeting ground is desirable for those nations which are prepared to assist in the development effort.

Conventional images of Jews have this in common with all perceptions of a configuration in which one feature is held constant: images can be both true and false.

If art is to release us from these postulated things ( things we must think symbolically about ) and bring us back to the ineffable beauty and richness of the aesthetic component of reality in its immediacy, it must sever its connection with these common sense entities ''.

In the wide range of experiences common to our earth-bound race none is more difficult to manage, more troublesome, and more enduring in its effects than the control of love and hate.

`` History has this in common with every other science: that the historian is not allowed to claim any single piece of knowledge, except where he can justify his claim by exhibiting to himself in the first place, and secondly to any one else who is both able and willing to follow his demonstration, the grounds upon which it is based.

To obey the moral law is just ordinary common sense, applied to a neglected field.

British common sense is proverbial.

This de-iodinating enzyme is effective against mono- and di-iodotyrosine, but does not de-iodinate thyroxine or tri-iodothyronine.

The inhibition of the enzyme by very low concentrations of lanthanum ion is probably the strongest known biological effect of rare earth salts.

* in genetics, ADA is the abbreviation of Adenosine deaminase enzyme

For example, NDM-1 is a newly identified enzyme conveying bacterial resistance to a broad range of beta-lactam antibacterials.

An abzyme ( from antibody and enzyme ), also called catmab ( from catalytic monoclonal antibody ), is a monoclonal antibody with catalytic activity.

A new and unique type of enzyme is produced.

Ampicillin acts as a competitive inhibitor of the enzyme transpeptidase, which is needed by bacteria to make their cell walls.

The enzyme responsible for degrading ampicillin is called beta-lactamase, in reference to the beta-lactam structure of ampicillin and related drugs.

He originally believed those substances to be precursors of antibodies, just like zymogen is a precursor of an enzyme.

Adenylate cyclase (, also known as adenylyl cyclase, adenyl cyclase or AC ) is an enzyme with key regulatory roles in nearly all cells.

It is the most polyphetic known enzyme: six distinct classes have been described, all catalyzing the same reaction but representing unrelated gene families with no known sequence or structural homology.

These are the smallest of the AC enzyme classes ; the AC-IV from Yersinia is a dimer of 19 kDa subunits with no known regulatory components.

Albinism ( from Latin albus, " white "; see extended etymology, also called achromia, achromasia, or achromatosis ) is a congenital disorder characterized by the complete or partial absence of pigment in the skin, hair and eyes due to absence or defect of tyrosinase, a copper-containing enzyme involved in the production of melanin.

The relative importance and interactions between these different antioxidants is a very complex question, with the various metabolites and enzyme systems having synergistic and interdependent effects on one another.

Bromine has no essential function in mammals, though it is preferentially used over chloride by one antiparasitic enzyme in the human immune system.

Though this enzyme is the most prolific creator of organic bromides by living organisms, other bromoperoxidases exist in nature that do not use vanadium.

The enzyme itself is not used up in the process, and is free to catalyze the same reaction with a new set of substrates.

This is because of its fibrous husk, which is important not only in the sparging stage of brewing ( in which water is washed over the mashed barley grains to form the wort ) but also as a rich source of amylase, a digestive enzyme that facilitates conversion of starch into sugars.

Several proteins coded for in the tra or trb locus seem to open a channel between the bacteria and it is thought that the traD enzyme, located at the base of the pilus, initiates membrane fusion.

When conjugation is initiated by a signal the relaxase enzyme creates a nick in one of the strands of the conjugative plasmid at the oriT.

In the F-plasmid system the relaxase enzyme is called TraI and the relaxosome consists of TraI, TraY, TraM and the integrated host factor IHF.

An anti-oligosaccharide enzyme is necessary to properly digest these sugar molecules.