Here is what users have to say about Enzyme

useravatar
Entry added by CWAnswers Join us and contribute your knowledge as well.

Select content modules

GLO1%20Homo%20sapiens%20small%20fast.gif

Enzymes are biomolecules that catalyze (i.e. increase the rates of) chemical reactions. Almost all enzymes are proteins. In enzymatic reactions, the molecules at the beginning of the process are called substrates, and the enzyme converts them into different molecules, the products. Almost all processes in a biological cell need enzymes to occur at significant rates. Since enzymes are selective for their substrates and speed up only a few reactions from among many possibilities, the set of enzymes made in a cell determines which metabolic pathways occur in that cell.

Help us make CWAnswers better. Be the first one to edit this topic!

Weblinks for Enzyme

Top 10 for Enzyme

Things about Enzyme you find nowhere else.

Comments about this page

We love comments and hate spam too. You can add your comment by clicking on 'open comment input' below.
Show/Hide

Images found for Enzyme

enzyme-3.jpgenzyme-2.jpgenzyme.jpg
enzyme-1.jpgenzyme_model.jpgenzyme.jpg
enzyme.jpgenzyme-cleaner.jpgPapaya Enzyme_WEB.jpg

Wikipedia about Enzyme

GLO1%20Homo%20sapiens%20small%20fast.gif

Enzymes are biomolecules that catalyze (i.e. increase the rates of) chemical reactions. Almost all enzymes are proteins. In enzymatic reactions, the molecules at the beginning of the process are called substrates, and the enzyme converts them into different molecules, the products. Almost all processes in a biological cell need enzymes to occur at significant rates. Since enzymes are selective for their substrates and speed up only a few reactions from among many possibilities, the set of enzymes made in a cell determines which metabolic pathways occur in that cell.

Like all catalysts, enzymes work by lowering the activation energy (Ea or ΔG) for a reaction, thus dramatically increasing the rate of the reaction. Most enzyme reaction rates are millions of times faster than those of comparable un-catalyzed reactions. As with all catalysts, enzymes are not consumed by the reactions they catalyze, nor do they alter the equilibrium of these reactions. However, enzymes do differ from most other catalysts by being much more specific. Enzymes are known to catalyze about 4,000 biochemical reactions. A few RNA molecules called ribozymes catalyze reactions, with an important example being some parts of the ribosome. Synthetic molecules called artificial enzymes also display enzyme-like catalysis.

Enzyme activity can be affected by other molecules. Inhibitors are molecules that decrease enzyme activity; activators are molecules that increase activity. Many drugs and poisons are enzyme inhibitors. Activity is also affected by temperature, chemical environment (e.g. pH), and the concentration of substrate. Some enzymes are used commercially, for example, in the synthesis of antibiotics. In addition, some household products use enzymes to speed up biochemical reactions (e.g., enzymes in biological washing powders break down protein or fat stains on clothes; enzymes in meat tenderizers break down proteins, making the meat easier to chew).

Etymology and history

Eduardbuchner.jpg

In the 19th century, when studying the fermentation of sugar to alcohol by yeast, Louis Pasteur came to the conclusion that this fermentation was catalyzed by a vital force contained within the yeast cells called "ferments", which were thought to function only within living organisms. He wrote that "alcoholic fermentation is an act correlated with the life and organization of the yeast cells, not with the death or putrefaction of the cells."

In 1878 German physiologist Wilhelm Kühne (1837–1900) first used the term enzyme, which comes from Greek ἔνζυμον "in leaven", to describe this process. The word enzyme was used later to refer to nonliving substances such as pepsin, and the word ferment used to refer to chemical activity produced by living organisms.

Search results for Enzyme

Enzyme Testing Labs™

Enzyme Testing Labs™ provides all the leading game testing services on multiple platforms, including functionality, compatibility, localization, MMOG tests and ...www.enzyme.org/

Enzyme Explorer: the most comprehensive source... - SigmaAldrich.com

Find information on Enzyme Explorer: the most comprehensive source of enzymes, substrates, activators, & inhibitors. and related products at SigmaAldrich.comwww.sigmaaldrich.com/Area_of_Interest/Biochemicals/Enzyme_Ex...

Enzyme K-12 Experiments for Lesson Plans & Science Fair Projects

Enzyme K-12 experiments & background information for lesson plans, class activities & science fair projects ... Enzyme Grabbers - Randyll Warehime, Woodrow ...www.juliantrubin.com/encyclopedia/biochemistry/enzyme.html

Enzyme definition - Medical Dictionary definitions of popular medical ...

Online Medical Dictionary and glossary with medical definitions ... Scientists ID Enzyme That Allows Dysentery Amoeba to Hide. Enzyme Beneficial to Alzheimer's ...www.medterms.com/script/main/art.asp?articlekey=3266

enzyme - Definition from the Merriam-Webster Online Dictionary

Definition of enzyme from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.www.merriam-webster.com/dictionary/enzyme

Images found for Enzyme

enzyme.jpgenzyme_1.jpg061011.enzyme.jpg
3)_model_of_enzyme_structure_200.JPGenzyme.jpgES_complex.jpg
enzyme1.jpgEnzyme.jpgenzyme-1.jpg

News about Enzyme

Higher Urinary Levels Of Commonly Used Plastic Compound, BPA, Linked To Cardiovascular Disease, Diabetes

Science DailyHigher levels of urinary Bisphenol A (BPA), a chemical compound commonly used in plastic packaging for food and beverages, is associated with cardiovascular disease, type 2 diabetes and liver-enzyme abnormalities, according to a study in the September 17 issue of JAMA. This study is being released early to coincide with a Food and Drug Administration (FDA) hearing on BPA. http://www.sciencedaily.com/releases/2008/09/080916100942.ht...

'There is reason for concern for everyone'

Chicago TribuneResearch says chemical found in food containers affect adults as well as children A major study links a chemical used to make food and beverage containers with cardiovascular disease, type 2 diabetes and liver-enzyme abnormalities. http://www.chicagotribune.com/news/chi-bpa-websep17,0,564289...

Enobia Pharma reports positive preclinical data from hypophosphatasia study

Pharmaceutical Business ReviewEnobia Pharma has reported positive preclinical data demonstrating that its enzyme replacement therapy for hypophosphatasia appears to heal bones that have already been severely weakened by the disease.http://www.pharmaceutical-business-review.com/article_news.a...

Higher urinary levels of commonly used chemical, BPA, linked with cardiovascular disease, diabetes

EurekAlert!( JAMA and Archives Journals ) Higher levels of urinary Bisphenol A, a chemical compound commonly used in plastic packaging for food and beverages, is associated with cardiovascular disease, type 2 diabetes and liver-enzyme abnormalities, according to a study in the Sept. 17 issue of JAMA. This study is being released early to coincide with a Food and Drug Administration hearing on BPA.http://www.eurekalert.org/pub_releases/2008-09/jaaj-hul09110...

Clean living 'slows cell ageing'

BBC NewsA healthy lifestyle may help increase levels of an enzyme vital for guarding against age-related cell damage, work suggests.http://news.bbc.co.uk/go/rss/-/2/hi/health/7616660.stm

News about Enzyme

Built-In Enzyme Could Destroy HIV

SoftpediaNew research uncovered the exact atomic structure of an enzyme that can destroy HIV even in its earliest stages, before it gets a chance to transcribe and replicate. Apparently, it acts as a natural immune reaction to the virus, but, during its ... http://news.softpedia.com/news/Built-In-Enzyme-Could-Destroy...

Nu Skin Scientists Correlate the Appearance of Aging With arNOX Free ...

ForbesThe arNOX enzyme is one in a class of newly-identified ECTO-NOX (external NADH oxidase or ENOX) proteins that are located on external cell membranes. ECTO-NOX proteins become increasingly active to generate additional metabolic energy as cell ... http://www.forbes.com/prnewswire/feeds/prnewswire/2008/10/13...

Light Detecting Enzyme in the Eye Discovered

SoftpediaThe main enzyme responsible for converting light to flows of energy for the brain has been detected for the first time, using high-resolution X-ray crystallography and nuclear magnetic resonance imaging. UW biochemist Clemens Heikaus, and Rutgers ... http://news.softpedia.com/news/Light-Detecting-Enzyme-In-The...

CODA Genomics Signs Collaboration Agreement with Genencor

Phramalive.comGenencor, a division of Danisco A/S, is a world leader in industrial biotechnology and a pioneer in enzyme innovation and systems biology. Genencor improves process and product performance for a spectrum of industries, from biofuels and laundry ... http://www.pharmalive.com/News/Index.cfm?articleid=577469

Atomic-resolution views suggest function of enzyme that regulates ...

PhysOrgAn atomic-resolution view of an enzyme found only in the eye has given researchers at the University of Washington (UW) clues about how this enzyme, essential to vision, is activated. The enzyme, phosphodiesterase 6 (PDE6), is central to the way ... http://www.physorg.com/news142604777.html

Search results for Enzyme

Digestive Enzymes | Digestive Enzyme Supplements | Therapeutic Enzymes ...

Enzyme Supplements - Digestive Enzymes - High quality enzymes and enzyme supplements by Enzymedica: the Enzyme Experts.http://www.enzymedica.com/

enzyme - Hutchinson encyclopedia article about enzyme

Biological catalyst produced in cells, and capable of speeding up the chemical reactions necessary for life. They are large, complex proteins, usually soluble, and are highly ... http://encyclopedia.farlex.com/enzyme

enzyme - definition of enzyme by the Free Online Dictionary, Thesaurus ...

en·zyme   (n z m) n. Any of numerous proteins or conjugated proteins produced by living organisms and functioning as biochemical catalysts. [German Enzym, from Medieval Greek enz ... http://www.thefreedictionary.com/enzyme

Enzyme International: helping companies discover how to attract, win ...

enzyme international, business consultants, business consultancy, churn reduction, customer discovery, customer experience management, customer experience, customer experience ... http://www.enzymeinternational.com/

Enzyme definition of Enzyme in the Free Online Encyclopedia.

enzyme, biological catalyst catalyst, substance that can cause a change in the rate of a chemical reaction without itself being consumed in the reaction; the changing of the ... http://encyclopedia2.thefreedictionary.com/enzyme
  • Recent
  • Mine
  • Watched
  • Commented
You must be logged in to perform this operation
You must be logged in to perform this operation

Search this site

Videos found for Enzyme

Discover Digestive Enzyme Supplemen...

Discover Digestive Enzyme Supplementshttp://www.getenzymes.com Discover the benefits of using digestive enzyme supplements. Informational video educates you on why digestive enzyme supplements helps you to digest and...MPEG 4 - Video

Discover Digestive Enzyme Supplemen...

Discover Digestive Enzyme Supplementshttp://www.getenzymes.com Discover the benefits of using digestive enzyme supplements. Informational video educates you on why digestive enzyme supplements helps you to digest and...Flash - Video

Discover Digestive Enzyme Supplemen...

Discover Digestive Enzyme Supplementshttp://www.getenzymes.com Discover the benefits of using digestive enzyme supplements. Informational video educates you on why digestive enzyme supplements helps you to digest and...Flash - Video

Enzyme May Be Responsible For Seizu...

Enzyme May Be Responsible For Seizures In Alzheimer's PatientsResearchers have found an enzyme that interferes with a part of brain cells linked to seizures. Sandra Mitchell reports.Windows Media - Video

The.Guyver - Zoanoid.Data.File.18 -...

The.Guyver - Zoanoid.Data.File.18 - Enzyme.II. aL .aviChrono dataFlash - Video

Videos found for Enzyme

Enzyme incubation 2 (14-05-2005) 3....

Enzyme incubation 2 (14-05-2005) 3.wmvEnzyme incubation 2msmedia: 0.8 MB w:320px - h:240px

Enzyme incubation 2 (14-05-2005) 2....

Enzyme incubation 2 (14-05-2005) 2.wmvEnzyme incubation 2msmedia: 0.9 MB w:320px - h:240px

enzyme6.mpg

enzyme6.mpg(176x120 MPEG movie @3frames/sec, 32.5MB) (352x240 MPEG movie @6frames/sec, 57.6MB) (Contact Nam Sun Wang for VHS tapes, VideoCDs, or full resolution mpegs.)mpeg: 54.9 MB w:352px - h:240px

Transformation Enzyme Co.

Transformation Enzyme Co.Transformation Enzyme Co. 6 min 2 sec - Nov 14, 2006 Dr. DicQie Fuller discusses the origin of Transformation Enzyme Co., and her personal story in developing her digestive enzymes product line. M...flash: 0 MB w:320px - h:240px

enzyme.mov

enzyme.movchymo-subs.pdb 17-Mar-2005 13:13 183k cyclooxygenase.pdb 16-Mar-2005 16:00 794k enzyme.mov 16-Mar-2005 16:01 1.6M felixhoffmann.jpg 16-Mar-2005 16:00 20kquicktime: 1.5 MB w:320px - h:230px

Answers for Enzyme

ABCD

Are enzymes capable of reversible action? Can an enzyme that breaks molecules put them back together?

ABCDYes, they can. But they cannot do it with different kinds of molecules, only certain ones.
ratiefanatic

When electrons are transported to enzyme complex 1, where is a proton transported?

ratiefanaticC, to the intermembrane space. This is a really good link if you need more help with oxidative phosphorylation. http://web.indstate.edu/thcme/mwking/oxidative-phosphorylation.html
Michelle J

Do you loose a digestive enzyme in your stomach after being vegetarian?

Michelle JYou don't lose anything. What happens is that your body has become unaccustomed to eating it, that's all. When babies are first eating real foods, you have to build them up with the milder meats first...
Will A

What is the enzyme which can stand the highest temperature without denaturing?

Will Amairdo: Taq polymerases are what those enzymes are called, and they can stand the 95C of a typical PCR reaction. But in my humble opinion, RNases are the most hardy enzymes around. Some of them can wi...
caitlin_buelt

How do our bodies produce the enzyme alcohol dehydrogenase?

caitlin_bueltYou may think of it as a process of protein synthesis. There are genes coding for different isozymes of alcohol dehydrogenase, what u need is: Transcription Translation Post-translational modifica...

Attributions

Web, Images, Video, News and Answers Search Results are "Powered by Yahoo!"
Web, Images, News Search Results are "Powered by MSN"
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article .
Disclaimer: All other trademarks, registered trademarks, product names and company names or logos mentioned herein are the property of their respective owners.
Contact Us[X]
Your name
Email
Subject
Your comment