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Glycogen is a polysaccharide of glucose (Glc) which functions as the secondary short term energy storage in animal cells. It is made primarily by the liver and the muscles, but can also be made by the brain, uterus, and the vagina. Glycogen is the analogue of starch, a less branched glucose polymer in plants, and is commonly referred to as animal starch, having a similar structure to amylopectin. Glycogen is found in the form of granules in the cytosol in many cell types, and plays an important role in the glucose cycle. Glycogen forms an energy reserve that can be quickly mobilized to meet a sudden need for glucose, but one that is less compact than the energy reserves of triglycerides (fat). In the liver hepatocytes, glycogen can compose up to 8% of the fresh weight (100–120 g in an adult) soon after a meal. Fact: date=May 2007 Only the glycogen stored in the liver can be made accessible to other organs. In the muscles, glycogen is found in a much lower concentration (1% of the muscle mass), but the total amount exceeds that in liver. Small amounts of glycogen are found in the kidneys, and even smaller amounts in certain glial cells in the brainFact: date=June 2008 and white blood cellsFact: date=June 2008. The uterus also stores glycogen during pregnancy to nourish the embryo.

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Wikipedia About Glycogen

Glycogen is a polysaccharide of glucose (Glc) which functions as the secondary short term energy storage in animal cells. It is made primarily by the liver and the muscles, but can also be made by the brain, uterus, and the vagina. Glycogen is the analogue of starch, a less branched glucose polymer in plants, and is commonly referred to as animal starch, having a similar structure to amylopectin. Glycogen is found in the form of granules in the cytosol in many cell types, and plays an important role in the glucose cycle. Glycogen forms an energy reserve that can be quickly mobilized to meet a sudden need for glucose, but one that is less compact than the energy reserves of triglycerides (fat). In the liver hepatocytes, glycogen can compose up to 8% of the fresh weight (100–120 g in an adult) soon after a meal. Fact: date=May 2007 Only the glycogen stored in the liver can be made accessible to other organs. In the muscles, glycogen is found in a much lower concentration (1% of the muscle mass), but the total amount exceeds that in liver. Small amounts of glycogen are found in the kidneys, and even smaller amounts in certain glial cells in the brainFact: date=June 2008 and white blood cellsFact: date=June 2008. The uterus also stores glycogen during pregnancy to nourish the embryo.

Structure and biochemistry

Glycogen.png

Function and regulation of liver glycogen

As a meal containing carbohydrates is eaten and digested, blood glucose levels rise, and the pancreas secretes insulin. Glucose from the hepatic portal vein enters the liver cells (hepatocytes). Insulin acts on the hepatocytes to stimulate the action of several enzymes, including glycogen synthase. Glucose molecules are added to the chains of glycogen as long as both insulin and glucose remain plentiful. In this postprandial or "fed" state, the liver takes in more glucose from the blood than it releases.

After a meal has been digested and glucose levels begin to fall, insulin secretion is reduced, and glycogen synthesis stops. About four hours after a mealFact: date=May 2007, glycogen begins to be broken down and converted again to glucose. Glycogen phosphorylase is the primary enzyme of glycogen breakdown. For the next 8–12 hours, glucose derived from liver glycogen will be the primary source of blood glucose to be used by the rest of the body for fuel.

Glucagon is another hormone produced by the pancreas, which in many respects serves as a counter-signal to insulin. When the blood sugar begins to fall below normal, glucagon is secreted in increasing amounts. It stimulates glycogen breakdown into glucose even when insulin levels are abnormally high.

Search results for Glycogen

Glycogen Metabolism

Glycogen is a polymer of glucose residues linked mainly by a(1®4) glycosidic linkages. ... glycogen predominantly in liver and muscle cells. Glycogen ...www.rpi.edu/dept/bcbp/molbiochem/MBWeb/mb1/part2/glycogen.ht...

Glycogen

1.2 Which ends of the glycogen molecule give a reaction with Fehlings solution? ... A biopsy shows that the liver glycogen is of normal structure. ...www.ttuhsc.edu/som/courses/biochem/Glycogen.htm

Glycogen Structure

8.1B What is glycogen? Glycogen is a polymer of glucose residues which serves as the " ... The majority of the body's glycogen is located in the liver and brain. ...www.db.uth.tmc.edu/faculty/alevine/1521_2000/glycogen.htm

Glycogen

Glycogen. The brain and other tissues require a constant supply of blood glucose for survival. ... Glycogen is a chain of glucose subunits held together by a ...cmgm.stanford.edu/biochem200/glycogen/

glycogen

A second major source of stored glucose is the glycogen of skeletal muscle. However, muscle glycogen is not generally available to other tissues, because ...www.med.unibs.it/~marchesi/glycogen.html

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News about Glycogen

New Class of Drugs Might Cause Congenital Heart Defects

Health ScoutLithium is only such drug on market, but more powerful versions are in development, researcher warns.http://www.healthscout.com/news/1/619937/main.html

SoLo's Olympic Success Fuels NBA Preseason

PRWeb Fresh from the Success of the Beijing Olympics, SoLo Bars are Refueling the Best Players in Basketball as They Train and Prepare for the Upcoming NBA Preseason. (PRWeb Oct 3, 2008) Read the full story at http://www.prweb.com/releases/2008/10/prweb1420914.htm http://www.prweb.com/releases/2008/10/prweb1420914.htm

SoLo's Olympic Success Fuels NBA Preseason

PRWeb via Yahoo! News Fresh from the Success of the Beijing Olympics, SoLo Bars are Refueling the Best Players in Basketball as They Train and Prepare for the Upcoming NBA Preseason.http://news.yahoo.com/s/prweb/20081003/bs_prweb/prweb1420914...

New Class of Drugs Might Cause Congenital Heart Defects

ABC 7 El Paso By Ed Edelson , HealthDay Reporter THURSDAY, Oct. 2 (HealthDay News) -- An animal study raises a warning sign that a new class of drugs that shows promise against a...http://www.kvia.com/global/story.asp?s=9115372

Radcliffe goes for New York repeat to beat Olympic blues

Independent It is not the only race taking place across the pond in the first few days of next month – John McCain and Barack Obama will be going head-to-head for the White House 48 hours later – but the New York City Marathon on 2 November will have a certain fascination of its own, not least on this side of the Atlantic. It is only six-and-a-half weeks since Paula Radcliffe limped across the finish lin...http://www.independent.co.uk/sport/general/athletics/radclif...

News about Glycogen

Olympic Science 101: Physics & Physiology Behind the Games

Popular MechanicsTraining: Phelps trains every day of the year—4 hours in the pool, 1 hour on dry land. Since swimmers can burn about 1000 calories per hour, Phelps’s diet tends to be relatively high in carbohydrates to avoid glycogen depletion. Marathoner vs ... http://www.popularmechanics.com/outdoors/sports/4275469.html

Small is beautiful and trendy on the B/side

Calgary HeraldChocolate milk contains carbohydrates to replenish glycogen stores and protein to repair muscles after exercise. It also provides fluid to assist with re-hydration and contains potassium and sodium that are lost in sweat. Mélanie Olivier, a ... http://www.canada.com/cityguides/ottawa/story.html?id=c51ecf...

Bama eats to win

Tuscaloosa NewsThey want to be high in carbs and get enough protein to repair any muscle damage and replenish glycogen levels,' Kitchin said. According to Bonci, some of the most common nutrition mistakes include not drinking enough fluids, not eating at regular ... http://www.tuscaloosanews.com/article/20081007/NEWS/81006018...

SheKnows : Breast Cancer Awareness : Getting Involved : 10 training ...

Sheknows.comRest will help your muscles and joints repair, reducing your risk of injury, and give your muscles a chance to replenish their glycogen stores, which fuel your muscles during your workouts. You can also facilitate recovery by staying hydrated and ... http://www.sheknows.com/articles/805717.htm

New Class of Drugs Might Cause Congenital Heart Defects

MedicineNet.comThe drugs are aimed at a gene that produces a protein called glycogen synthase kinase-3 (GSK-3). The only drug now on the market that targets GSK-3 is lithium, given to treat bipolar disorder. It is a relatively weak GSK-3 inhibitor. Because of the ... http://www.medicinenet.com/script/main/art.asp?articlekey=93...

Search results for Glycogen

Glycogen

Glycogen is a polysaccharide that is the principal storage form of glucose (Glc) in animal and human cells. Glycogen is found in the form of granules in the cytosol in many cell ... http://www.sciencedaily.com/articles/g/glycogen.htm

glycogen - Hutchinson encyclopedia article about glycogen

Polymer (a polysaccharide) of the sugar glucose made and retained in the liver as a carbohydrate store, for which reason it is sometimes called animal starch.http://encyclopedia.farlex.com/glycogen

glycogen: Definition from Answers.com

glycogen n. A polysaccharide, (C 6 H 10 O 5 ) n , that is the main form of carbohydrate storage in animals and occurs primarily in the liver andhttp://www.answers.com/topic/glycogen

THE Medical Biochemistry Page

The Medical Biochemistry Page has moved. Please follow the link below. The Medical Biochemistry Pagehttp://www1.indstate.edu/thcme/mwking/glycogen.html

Glycogen - definition of Glycogen in the Medical dictionary - by the ...

glycogen /gly·co·gen/ (gli´ko-jen) a highly branched polysaccharide of glucose chains, the chief carbohydrate storage material in animals, stored primarily in liver and muscle ... http://medical-dictionary.thefreedictionary.com/Glycogen
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Answers for Glycogen

GeneticFreakHow Much Glycogen Can 1LB Of Muscle Store?GeneticFreakBallaHow good is fruit, for restoring glycogen in the muscles?Ballalonely arielWhy do animals store glycogen but not starch & why plants store starch but not glycogen?lonely arielstarch is the photosynthetic end product,so why use additional energy/cofactors/pathways for converting it to glycogen.plants store starch as its easy and economical for storage. In animals,starch-gl...roxas3000What is the effect of adding 30% KOH to glycogen in a solution?roxas3000I think the 30% KOH solution serves to lyse the liver cells so that they will release the glycogen. I use NaOH to chemically lyse bacterial cells, but it doesn't harm whatever I'm extracting. I'd im...blazzingred30What are the relationship between glucose and glycogen ?blazzingred30glucose is the form of which our body can digest. so all your carbs, once it;s get into your tummy, they will be broken down into glucose so that your body can absorb and utilise glycogen is stored...
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