what is melavonic acid pathway?
481250
Many organisms manufacture terpenoids through the HMG-CoA reductase pathway, the pathway that also produces cholesterol. The reactions take place in the cytosol. The pathway was discovered in the 1950s.
516806
I can't tell if you are asking about tranport across the plasma membrane or mitochondrial membrane.  Both lactate and pyruvate transport out of the cell (through the plasma membrane) is increased in acidic conditions.
348749
Glucose 6 phosphate is only immobilised by the attachment of the phophate group so that it cannot escape from the cell. Cells do not have the trasport machinery to export phosphorylated sugars. Further more, gluocse-6-phosphate formation does not guarantee glycolysis will continue, neither does the formation of F-6-P for that matter. This is because these intermediates can join pathways other than glycolysis. G-6-P for instance can join the Pentose Phosphate Pathway. So The G-6-P has to be oxidized to F-6-P and the F-6-P has to be reduced to F-1,6-bisphosphate. The F-1,6-BP formation is the committing step in glycolysis and hence naturally one of the regulation steps. It definitely will go into glycolysis. So oxidation of the intermediate G-6-P to F-6-P is needed and this has to be further oxidized to F-1,6-BP.
449567
It's an acid catalysed hydrolysis. The oxygen attached to the 2-carbon is protonated, then acetic acid is displaced from the ring by water, which is deprotonated to give salicylic acid. The vinegar smell is acetic acid. Note that the reaction cannot occur without water.
388535
it use an alternative pathway with a lower activation energy
443429
Malic Acid occurs naturally in all fruits. It is generated during fruit metabolism. Malic Acid is naturally present in seventeen different fruits.\n\nwhite grape\nblackberry\nprickly pear\npear\nwatermelon\nnectarine\nlychee\napple\norange \nbanana\nstrawberry\ntomato\nmango\nkiwi\npeach\nred sour cherry\nraspberry\n\nCheck this site out\n\nhttp://www.bartek.ca/malic_acid.html\n\nyou can also buy malic acid powder to add drinks, etc. yourself or take supplements with malic acid in it.\n\nTry your local GNC or other vitamin and nutrition stores near you. Or you can find suplements on the web, like here:\nhttp://www.calibex.com/malic-acid/zzcalibex1zB1z0--search-html
287597
The calvin cycle is the dark (non-light-requiring) biochemical pathway in plants that produces sugar from CO2.  It's discussed here: http://www.bio.umass.edu/biology/conn.river/calvin.html\n\nThe light reaction is also in chlorophyl, and uses the energy of light (photons) to start electron transport to generate energy in the form of ATP.  This ATP is then used by other processes including the dark reaction.  \n\nNote that the light reaction in plants is basically the same thing that goes on in mitocondria of eukaryotes (including plants), in which electron transport produces energy via ATP.  The dark cycle is essentially the reverse of glycolysis.  In the dark cycle sugar is produced at the expense of energy.  In glycolysis, sugar is broken down and energy released.  Glycolysis occurs in prokaryotes and eukaryotes (basially all living things), while the dark cycle only occurs in plants.
846611
it`s very long. I`ll give u a simple explanation!\n\nfirst; glycolisis.\nthe suger is broken into 2 molecules of pyruvic acid\n\nsecond;\nthe pyruvic acid is changed into acethyl co-A\n\nthird; the krebs cycle\nthe acethyl co-A is reacted with oxaloacetate acids, and during the cycle CO2 is released, and those compound returned back in oxaloacetat acids\n\nfourth; electron chain systems
556424
Malic acid and citric acid.\nThe first one is also found in apples.
250203
Melanin is a natural pigment that gives your skin its color. It's produced in cells called melanocytes, either in the top layer of the skin (epidermis) or the outer layers of the skin's second layer (dermis). Melanin is then transported to the surface cells of your skin. Normally, melanin is distributed evenly, but sometimes melanocytes grow together in a cluster, giving rise to moles.\n\nScientists don't know why moles develop or what purpose they serve, if any, although they do appear to be determined before birth. Most moles are harmless and don't require special care, but some people have unusual-looking moles, called dysplastic nevi, which are more likely to turn cancerous than ordinary moles are. Atypical moles occur most often on the back in both men and women, and also on the abdomen, chest and legs in women.
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I recommend the following link:\nhttp://www.amazon.com/Phytochemical-Methods-Modern-Techniques-Analysis/dp/0412343304\n\nYou will need to purchase a lab guide or consult with a Life Sciences Dept. for further assistance
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Serotonin is found extensively in the human gastrointestinal tract, or gut, as well as in the blood stream.\n\nIn the body, serotonin is synthesized from the amino acid tryptophan by various enzymes.\n\nSerotonin taken orally does not pass into the serotonergic pathways of the central nervous system because it does not cross the blood-brain barrier. However, the amino acid tryptophan and its metabolite 5-hydroxytryptophan, from which serotonin is synthesized, can and do cross the blood-brain barrier. These agents are available as dietary supplements and may be effective serotonergic agents.\n\nOne breakdown product of serotonin is 5-hydroxyindoleacetic acid (5-HIAA) which is excreted in the urine. Serotonin and 5HIAA are sometimes produced in excess amounts by certain cancer tumors, and levels of these substances may be measured in the urine to test for these tumors.
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The hydrogen gradient builds up creating a hyper-tonic positive gradient on one side that builds up and pushes the protons/Hydrogen atoms across that then creates energy used to synthesis your adenosinetriphosphate.\nI'm not sure if this is 100 percent right but i but something like it on my test last week. :)
273623
its solitaric acid.....its metabolism....\ncheck out the site listed!
324206
The N-end rule pathway is a ubiquitin-dependent degradation pathway.  Ubiquitin marks proteins for degradation.  Degradation signals include a few amino acids at the N-terminus and an internal.  So, you have a point that the N-end rule pathway would be pretty pointless if all proteins have methionine at their N-termini.  \n\nBut, the polypeptide produced after translation is by no means a complete protein.  Polypeptides undergo a lot of processing including processing by an N-terminal protease that can cleave methionine off.  Without such mechanisms, the action of proteins would be severely constrained--the N-end rule pathway being one mechanism that would be constrained without such protein processing.
155096
It's a great antioxydent...\n\nCoenzyme Q10 is a vitamin like compound also called ubiqueinone.  It is an essential component of cells and is utilized by the mitochondria in the normal process of energy production.  CoQ10 is constantly being reduced and oxidized as an energy carrier.
434155
Sugars in the diet.  Next, would be gluconeogenesis from the liver.