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Topic: Asparagine

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	asparagine. The Columbia Encyclopedia, Sixth Edition. 2001-05
		Like glutamine, asparagine is important in the metabolism of toxic ammonia in the body.
		Asparagine is not essential to the human diet, since it can be synthesized from aspartic acid.
		The first amino acid to be isolated from its natural source, asparagine was purified from asparagus juice in 1806; proof of the occurrence of this amino acid in proteins was finally obtained in 1932.
	www.bartleby.com /65/as/asparagi.html (200 words)

	BioMed Central \| Full text \| A glutamine-amidotransferase-like protein modulates FixT anti-kinase activity in ...
		Complementation test and DNA analysis revealed that inactivation of an asparagine synthetase-like gene was responsible for the phenotype of the mutant.
		The reactions catalyzed by asparagine synthetases involve two different family of proteins depending on whether glutamine or ammonia is used as a nitrogen source.
		Boehlein SK, Richards NG, Walworth ES, Schuster SM: Arginine 30 and asparagine 74 have functional roles in the glutamine dependent activities of Escherichia coli asparagine synthetase B. J Biol Chem 1994, 269:26789-95.
	www.biomedcentral.com /1471-2180/1/6 (4207 words)

	Asparagine (Site not responding. Last check: )
		Asparagine is a common nonessential amino acid that is found, primarily, in animal proteins.
		Because asparagine is readily synthesized by the body and does not have to be obtained by diet, appropriate food sources for human consumption remains limited.
		Asparagine is degraded by the preparation process of foods including cooking (heat), storage, or applying an acid based substance.
	www.supplementnews.org /asparagine (483 words)

	ASPARAGINE - Online Information article about ASPARAGINE
		In this way a mixture of the two asparagines was obtained, which were separated by picking out the hemihedral crystals.
		Hydrolysis by means of acids or alkalis converts the asparagines into aspartic acid; whilst on heating with water in a sealed See also:
		The constitution of the asparagines has been determined by A.
	encyclopedia.jrank.org /ARN_AUD/ASPARAGINE.html (286 words)

	Asparagine - LoveToKnow 1911
		457) synthesized the asparagines from the monomethyl ester of inactive aspartic acid by heating it with alcoholic ammonia.
		In this way a mixture of the two asparagines was obtained, which were separated by picking out the hemihedral crystals.
		Hydrolysis by means of acids or alkalis converts the asparagines into aspartic acid; whilst on heating with water in a sealed tube they are converted into ammonium aspartate.
	www.1911encyclopedia.org /Asparagine (234 words)

	Proteins & Amino Acids -Asparagine
		Asparagine is a nonessential amino acid, which means that it is manufactured from other amino acids in the liver; it does not have to be obtained directly through the diet.
		Low levels of asparagine may indicate poor metabolism or synthesis of aspartic acid, which can result in the inability to properly synthesize and excrete urea, which is the major waste product of excess dietary protein.
		It soon became apparent that asparagine and glutamine are soluble, nontoxic carriers of additional ammonia in the form of their amid groups.
	www.springboard4health.com /notebook/proteins_asparagine.html (407 words)

	BioCarta - Charting Pathways of Life
		Aspartate and asparagine are catabolized into oxaloacetate and the Kreb's cycle in a fairly direct pathway for amino acids with four carbons.
		Injection of asparaginase metabolizes the asparagine in the blood, withdrawing the supply of this essential nutrient from tumor cells, and causing asparagine-dependent tumor cells to die.
		Normal cells provide enough asparagine for their own needs through biosynthesis and are affected to a lesser extent by this treatment.
	www.biocarta.com /pathfiles/asparaginePathway.asp (165 words)

	MoonDragon's Health & Wellness: Nutrition - Amino Acids: Asparagine
		Asparagine is a non-essential amino acid (which means that it is manufactured from other amino acids in the liver, it does not have to obtained directly through the diet) and is closely related to aspartic acid.
		Asparagine is needed to maintain balance in the central nervous system; it prevents you from being either overly nervous or overly calm.
		Asparagine, the beta-amido derivative of aspartic acid, is considered a non-essential amino acid.
	www.moondragon.org /health/nutritionbasics/aminoacids/asparagine.html (376 words)

	Asparagine (Site not responding. Last check: )
		A byproduct of the breakdown of asparagine (asparagine-amino-succinic-acid monoamide) is also blamed for the smell in some people's urine after they have eaten asparagus (Some scientists disagree and implicate other substances in the smell, especially methanethiol).
		Asparagine was first discovered in asparagus, which has a high concentration of the amino acid.
		Asparagine is a nonessential amino acid, meaning that it can be synthesized from central metabolic pathyway intermediates in humans.
	www.dejavu.org /cgi-bin/get.cgi?ver=93&url=http%3A%2F%2Farticles.gourt.com%2F%3Farticle%3Dasparagine%26type%3Den (341 words)

	Cereal Chem 2004 \| Fermentation Reduces Free Asparagine in Dough and Acrylamide Content in Bread.
		The content of free asparagine was determined in 11 milling fractions from wheat and rye.
		Fermentation (baker’s yeast or baker’s yeast and sourdough) of doughs made with the different milling fractions was performed to investigate whether the content of free asparagine was reduced by this process.
		In general, most of the asparagine was utilized after 2 hr of fermentation with yeast.
	www.aaccnet.org /cerealchemistry/abstracts/2004/0805-03R.asp (337 words)

	Amino Acids - Alanine
		The amide is rather easily hydrolyzed, converting asparagine to aspartic acid.
		This process is thought to be one of the factors related to the molecular basis of aging.
		Asparagine has a high propensity to hydrogen bond, since the amide group can accept two and donate two hydrogen bonds.
	www.biology.arizona.edu /biochemistry/problem_sets/aa/Asparagine.html (102 words)

	Mechanism of regulation of ornithine decarboxylase gene expression by asparagine in a variant mouse neuroblastoma cell ...
		Mechanism of regulation of ornithine decarboxylase gene expression by asparagine in a variant mouse neuroblastoma cell line
		that asparagine caused a 12-15-fold increase in ODC mRNA.
		Interaction of asparagine and EGF in the regulation of ornithine decarboxylase in IEC-6 cells
	www.jbc.org /cgi/content/abstract/267/10/6946 (581 words)

	C&EN: TODAY'S HEADLINES - ACRYLAMIDE MYSTERY SOLVED
		But the amount of free asparagine, as well as the availability of sugars in foods, could also be a factor: Potatoes and certain cereal grains contain high levels of free asparagine, Mottram says, and are rich in carbohydrates.
		Both the Nestlé and PandG teams have mass spectrometry data showing that the reaction between asparagine and sugar yields an N-linked glycoside.
		Isotopic labeling shows that it's the asparagine portion of this intermediate that becomes acrylamide, but the exact mechanism remains unknown.
	pubs.acs.org /cen/topstory/8040/8040notw2.html (407 words)

	Definition of asparagine - Merriam-Webster Online Dictionary
		Learn more about "asparagine" and related topics at Britannica.com
		Find more about "asparagine" instantly with Live Search
		See a map of "asparagine" in the Visual Thesaurus
	www.m-w.com /dictionary/asparagine (26 words)

	asparagine \| English \| Dictionary & Translation by Babylon
		Asparagine is one of the 20 most common natural amino acids on Earth.
		It is considered a non-essential amino acid.Its three-letter abbreviation is Asn, and its one-letter abbreviation is N. A three-letter designation for either asparagine or aspartic acid is Asx (one-letter abbreviation: B).A reaction between asparagine and reducing sugars or reactive carbonyls produces acrylamide (acrylic amide) in food when heated to sufficient temperature, i.e.
		asparagine, type of amino acid found commonly in plants (first found in asparagus)
	www.babylon.com /definition/asparagine (156 words)

	Drugs - Anti-cancer
		This means they use both asparagine from the diet as well as what they can make themselves (which is limited) to satisfy their large asparagines demand.
		L-asparaginase is an enzyme that destroys asparagine external to the cell.
		Normal cells are able to make all the asparagine they need internally whereas tumor cells become depleted rapidly and die.The enzyme converts asparagine in the blood into aspartic acid by a deamination reaction.
	www.elmhurst.edu /~chm/vchembook/655cancer.html (1027 words)

	Asparagine (Site not responding. Last check: )
		Asparagine is the ß-amide of aspartic acid synthesized from aspartic acid and ATP (adenosine triphosphate).
		Both asparagine and glutamine are made with high-energy ATP and can return this energy when they metabolize back to aspartic acid and glutamic acid respectively.
		Asparagine is very active in converting one amino acid into another (amination and transamination) when the need arises.
	www.innvista.com /health/nutrition/amino/asparag.htm (190 words)

	Primary aliphatic hydrocarbon amino alkylene-substituted asparagine and a motor fuel composition containing same - ...
		A primary aliphatic hydrocarbon amino alkylene-substituted asparagine represented by the formula: ##STR1## in which R is a primary aliphatic hydrocarbon radical having from about 6 to 30 carbon atoms, R' is hydrogen or a methyl radical is provided and a motor fuel composition containing same.
		A novel primary aliphatic hydrocarbon aminoalkylene-substituted asparagine compound is provided which is useful as a multifunctional additive when employed in a liquid hydrocarbon fuel for an internal combustion engine.
		The primary aliphatic hydrocarbon amino alkylenesubstituted asparagine of the invention is represented by the formula: ##STR3## in which R represents a primary aliphatic hydrocarbon radical having from 6 to 30 carbon atoms and R' is hydrogen or a methyl radical.
	www.freepatentsonline.com /4207079.html (2987 words)

	L-asparaginase (Site not responding. Last check: )
		Asparagine is an amino acid required by cells for the production of protein.
		Asparagine can be produced within a cell through an enzyme called “asparagine synthetase” or it can absorbed into the cell from the outside (ie it is consumed in the patient’s diet, absorbed into the body and made available to the body’s cells.)
		This means they use both asparagine from the diet as well as what they can make themselves (which is limited) to satisfy their large asparagines demand.
	www.marvistavet.com /html/body_l-asparaginase.html (414 words)

	CiteULike: Asparagine and glutamine: using hydrogen atom contacts in the choice of side-chain amide orientation. (Site not responding. Last check: )
		CiteULike: Asparagine and glutamine: using hydrogen atom contacts in the choice of side-chain amide orientation.
		Asparagine and glutamine: using hydrogen atom contacts in the choice of side-chain amide orientation.
		Small-probe contact dot surface analysis, with all explicit hydrogen atoms added and their van der Waals contacts included, was used to choose between the two possible orientations for each of 1554 asparagine (Asn) and glutamine (Gln) side-chain amide groups in a dataset of 100 unrelated, high-quality protein crystal structures at 0.9 to 1.7 A resolution.
	www.citeulike.org /user/blackbart/article/277890 (859 words)

	asparagine - HighBeam Encyclopedia (Site not responding. Last check: )
		asparagine, organic compound, one of the 20 amino acids commonly found in animal proteins.
		Its structure is identical to that of the amino acid aspartic acid, except that the latter compound's acidic side-chain carboxyl group has been coupled with ammonia, yielding an amide.
		Like glutamine, asparagine is important in the metabolism of toxic ammonia in the body.
	www.encyclopedia.com /doc/1E1-asparagi.html (566 words)

	vgn-ext-hidden_Abstract (Site not responding. Last check: )
		In vivo, the equilibrium asparagine level depends on the input rate of ASN derived from the nutrients plus the de novo biosyn...
		In vivo, the equilibrium asparagine level depends on the input rate of ASN derived from the nutrients plus the de novo biosynthesis minus its deamination from the serum ASNase activity.
		Asparagine depletion after pegylated E. coli asparaginase treatment and induction outcome in children with acute lymphoblastic leukemia in first bone marrow relapse: A Children's Oncology Group study (CCG-1941).
	www.plwc.org /portal/site/ASCO/menuitem.34d60f5624ba07fd506fe310ee37a01d/?vgnextoid=76f8201eb61a7010VgnVCM100000ed730ad1RCRD&vmview=abst_detail_view&confID=40&index=y&abstractID=31452 (881 words)

	Asparagine / L Asparagine
		Since Asparagine is a non-essential Amino acid, this means that it is manufactured for other Amino acids in the liver; it does not have to be obtained directly through the diet.
		Asparagine is a vital component in the metabolism of toxic ammonia in the body, and having the proper levels of Asparagine, stimulates the kidneys and liver so they can perform their functions.
		Asparagine supplementation is not necessary unless illness has affected the metabolism and waste elimination function.
	www.herbalremedies.com /herbal/asparagine-information.html (699 words)

	asparagine - What is definition of the term - asparagine ? (Site not responding. Last check: )
		asparagine -- (a crystalline amino acid found in proteins and in many plants (e.g., asparagus))
		Its three-letter abbreviation is Asn, and its one-letter abbreviation is N. A three-letter designation for either asparagine or aspartic acid is Asx (one-letter abbreviation: B).
		A reaction between asparagine and reducing sugars or reactive carbonyls produces acrylamide (acrylic amide) in food when heated to sufficient temperature, i.e.
	www.linguasphere.org /dictionary/n-4479-asparagine.html (673 words)

	asparagine. The Columbia Encyclopedia, Sixth Edition. 2001-05 (Site not responding. Last check: )
		Like glutamine, asparagine is important in the metabolism of toxic ammonia in the body.
		The relatively unreactive, neutral amide group in the side chain of asparagine confers no special properties upon this amino acid once it is included within a protein by two peptide bonds.
		The first amino acid to be isolated from its natural source, asparagine was purified from asparagus juice in 1806; proof of the occurrence of this amino acid in proteins was finally obtained in 1932.
	www.bartelby.com /65/as/asparagi.html (200 words)

	The Individualist: Asparagine
		Asparagine was first isolated in 1806 from asparagus juice, in which it is abundant--hence its name--becoming the first amino acid to be isolated.
		Asparagine is a nonessential amino acid, meaning that it can be synthesized from central metabolic pathyway intermediates in humans.
		Properties of asparagine synthetase in asparagine-independent variants of Jensen rat sarcoma cells induced by 5-azacytidine.
	www.dadamo.com /wiki/wiki.pl/Asparagine (450 words)

	L-Asparagine Monohydrate amino acid supplement
		L-Asparagine is a non-essential amino acid that is involved in the metabolic control of cell functions in nerve and brain tissue.
		It is biosynthesized from ASPARTIC ACID and AMMONIA by asparagine synthetase.
		Asparagine is classified as an amide because it is an amide derivative of aspartic acid.
	www.greatvistachemicals.com /amino_acids/L-asparagine_monohydrate.html (153 words)

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