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Topic: Flavin adenine dinucleotide

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	Flavin
		Flavin is a tricyclic heteronuclear organic ring whose biochemical source is the vitamin riboflavin.
		The flavin moiety is often conjugated with an adenosine diphosphate to form flavin adenine dinucleotide (e.g.
		FMN is a prosthetic group found in NADH dehydrogenase and FAD is a cofactor in the enzymes D-amino acid oxidase, glucose oxidase, and xanthine oxidase.
	www.ebroadcast.com.au /lookup/encyclopedia/fl/Flavin.html (129 words)

	Flavin - Wikipedia, the free encyclopedia
		Flavin is a tricyclic heteronuclear organic ring based on pteridine whose biochemical source is the vitamin riboflavin.
		The flavin moiety is often attached with an adenosine diphosphate to form flavin adenine dinucleotide (FAD), and in other circumstances, is found as flavin mononucleotide (or FMN), a phosphorylated form of riboflavin.
		Flavin adenine dinucleotide is a coenzyme for monoamine oxidase, D-amino acid oxidase, glucose oxidase, and xanthine oxidase.
	en.wikipedia.org /wiki/Flavin (164 words)

	Initial characterization of the primary photochemistry of AppA, a blue-light-using flavin adenine dinucleotide-domain ...
		The flavin adenine dinucleotide (FAD)-containing photoreceptor protein AppA (in which the FAD is bound to a novel so-called BLUF domain) from the purple nonsulfur bacterium Rhodobacter sphaeroides was previously shown to be photoactive by the formation of a slightly redshifted long-lived intermediate that is thought to be the signaling state.
		One such regulator is the flavin adenine dinucleotide (FAD)-binding transcriptional antirepressor protein AppA, which interacts with the PpsR repressor protein to contribute to regulation of the expression of the puc, puf, bch and crt operons.
		In contrast, the FAD moiety appears to be involved in the persistent phase of blue-light-mediated repression of the transcription of photosynthetic genes, as first observed by Shimada et al.
	www.findarticles.com /p/articles/mi_qa3931/is_200309/ai_n9291739 (1000 words)

	Riboflavin (Vitamin B₂)
		It is the precursor of flavin mononucleotide (FMN, riboflavin monophosphate) and flavin adenine dinucleotide (FAD).
		FAD is a cofactor for methylenetetrahydrofolate reductase, which is important for the formation of 5-methyltetrahydrofolate.
		FAD and FMN are converted to riboflavin in the small intestine via the action of pyrophosphatase and phosphatase, respectively.
	www.pdrhealth.com /drug_info/nmdrugprofiles/nutsupdrugs/rib_0263.shtml (3349 words)

	Linus Pauling Institute at Oregon State University
		In the body, riboflavin is primarily found as an integral component of the coenzymes, flavin adenine dinucleotide (FAD) and flavin mononucleotide (FMN) (1).
		Flavins are critical for the metabolism of carbohydrates, fats, and proteins.
		FAD is part of the electron transport (respiratory) chain, which is central to energy production.
	lpi.oregonstate.edu /infocenter/vitamins/riboflavin/index.html (1998 words)

	Methemoglobinemia and Eccentrocytosis in Equine Erythrocyte Flavin Adenine Dinucleotide Deficiency -- Harvey et al. 40 ...
		Methemoglobinemia and Eccentrocytosis in Equine Erythrocyte Flavin Adenine Dinucleotide Deficiency
		reductase deficiency; eccentrocytes; erythrocytes; FAD; flavin adenine dinucleotide; glutathione reductase deficiency; methemoglobinemia; riboflavin.
		Flavin adenine dinucleotide roles in reductive pathways of erythrocytes.
	www.vetpathology.org /cgi/content/full/40/6/632 (4888 words)

	Highbeam Encyclopedia - Search Results for adenine
		Adenine combines with the sugar ribose to form adenosine, which in turn can be bonded with from one to three phosphoric acid units, yielding the three nucleotides adenosine monophosphate, adenosine diphosphate, and adenosine triphosphate.
		DPN in biochemistry, abbreviation for diphosphopyridine nucleotide, a coenzyme now usually called nicotinamide adenine dinucleotide, or NAD.
		ATP serves as the major energy source within the cell to drive a number of biological processes such as photosynthesis, muscle contraction, and the synthesis of proteins.
	www.encyclopedia.com /SearchResults.aspx?Q=adenine (369 words)

	Riboflavin, J5
		FAD and FMN are known as flavins since they are derived from riboflavin.
		Specifically, FAD and FMN are involved in the activity of the electron transport chain, an essential component of energy metabolism that is known to be impaired in people with HD.
		In the electron transport chain, FMN is one of the components of complex I while FAD is involved in the activity of complex II.
	www.stanford.edu /group/hopes/treatmts/ebuffer/j5.html (1112 words)

	Highbeam Encyclopedia - Search Results for flavin
		In the early 1960s, Flavin experimented with fluorescent lights, bending them into complex, angular shapes.
		Some utilize flavin coenzymes derived from riboflavin (see vitamin B 2).
		Optical manoeuvres in the light; In 1963 the New York sculptor Dan Flavin found his ideal material: the fluorescent tube.
	www.encyclopedia.com /SearchResults.aspx?Q=flavin (433 words)

	Flavin adenine dinucleotide-iodothyronine conjugates - Patent 4171432
		Conjugates of the formula: ##STR1## wherein Riboflavin-(Phos).sub.2 -Ribose represents the riboflavin-pyrophosphate-ribose residue in flavin adenine dinucleotide (FAD), n equals 2 through 6, Y is hydrogen or trifluoroacetyl, and.beta..sup.1 and.beta..sup.2 are, independently, hydrogen or iodine; and intermediates in the synthesis of such FAD conjugates.
		Novel flavin adenine dinucleotide-iodothyronine conjugates have been devised for use in binding assays for determining iodothyronines, and particularly in the assay referred to hereinbefore employing a prosthetic group label.
		The FAD-iodothyronine conjugates are used as labeled conjugates in binding assays for iodothyronines and are determined, i.e., monitored, for the purposes of the assay by measuring FAD activity, e.g., the coenzyme or prosthetic group activity of the labeled conjugate.
	www.freepatentsonline.com /4171432.html (4779 words)

	Flavin adenine dinucleotide-labeled conjugates for use in specific binding assays - Patent 4213893
		A flavin adenine dinucleotide-iodothyronine conjugate of the formula: ##STR31## wherein Riboflavin--Phos).sub.2 --Ribose represents the riboflavin-pyrophosphate-ribose residue in flavin adenine dinucleotide, n=2 through 6, Y is trifluoroacetyl, and.beta..sup.1 and.beta..sup.2 are, independently, hydrogen or iodine.
		Flavin adenine dinucleotide is mentioned as being useful as a coenzyme label since FAD functions as a coenzyme in useful monitoring reactions.
		Novel flavin adenine dinucleotide (FAD)-labeled conjugates have been devised for use in binding assays for determining ligands, or binding partners thereof, of analytical interest, such as the iodothyronines, and particularly for use in the assay referred to hereinbefore employing a prosthetic group label.
	www.freepatentsonline.com /4213893.html (7324 words)

	[No title]
		FAD is an important, ubiquitous redox cofactor, consisting of (like NAD) an AMP moeity in an anhydride linkage to FMN (flavin mononucleotide, shown in blue in the figure).
		The isoalloxazine ring system of FAD or FMN can accept one or two electrons, in contrast to NAD, which can only be reduced by two electrons at a time.
		The reduction of FAD involves the 1 and 5 nitrogen atoms (labelled red in the figure at left), and the oxidation states of FAD/FMN are shown in the figure below.
	guweb2.gonzaga.edu /faculty/cronk/biochem/F-index.cfm?definition=FAD (298 words)

	Riboflavin
		Flavins are a class of enzymes which are characterized by having a isoalloxazine ring as a part of their structure.
		Two of the most common flavin coenzymes are that of flavin adenine dinucleotide (FAD) and flavin mononucleotide (FMN).
		Flavin proteins, which are simply enzymes which contain a flavin coenzyme, may participate in either a one or two electron transfer.
	www.angelfire.com /ak2/chemists/rod6.html (324 words)

	Sequence-structure analysis of FAD-containing proteins -- Dym and Eisenberg 10 (9): 1712 -- Protein Science
		The AMP is composed of an adenine ring connected to a ribose that is connected to a phosphate group.
		The FAD molecule adopts an elongated conformation and is located in between the two subdomains with the adenine ring pointing toward them.
		The stick drawing of the cofactor is depicted with gray circles for atoms in the adenine and sugar rings, with red circles for phosphate and oxygen atoms, and fl circles for atoms for the isoalloxazine ring.
	www.proteinscience.org /cgi/content/full/10/9/1712 (7032 words)

	adenine — Infoplease.com
		Adenine is one of four nitrogenous bases utilized in the synthesis of
		nicotinamide adenine dinucleotide - nicotinamide adenine dinucleotide and nicotinamide adenine dinucleotide phosphate:see coenzyme.
		Differential-display polymerase chain reaction identifies nicotinamide adenine dinucleotide-ubiquinone oxidoreductase as an ischemia/......
	www.infoplease.com /ce6/sci/A0802487.html (269 words)

	Julian A. Peterson, Ph.D. (Site not responding. Last check: 2007-10-08)
		Titration of the FMN domain with sodium dithionite resulted in the conversion of the protein to the fully reduced FMNH2 form without accumulation of intermediate semiquinone forms; however, a similar titration of the FAD domain gave clear evidence for the presence of a neutral, blue flavin semiquinone during the reduction.
		Titrations of the reduced forms of the domains with artificial electron acceptors indicated that the electron-transferring properties of both the FAD- and FMN domains were also conserved.
		The rate constants of reoxidation of the fully reduced FAD and FMN domains by molecular oxygen at 20 degrees C were found to be 2.5 and 0.1 min-1, respectively.
	www.swmed.edu /home_pages/peterlab/ref4.htm (328 words)

	Autofluorescence Spectroscopy of Normal and Malignant Human Breast Cell Lines [para] Photochemistry and Photobiology - ...
		The fluorescence of tryptophan, reduced nicotinamide adenine dinucleotide (phosphate) (NAD(P)H) and flavin adenine dinucleotide (FAD) were characterized in normal human breast cells as well as in malignant human breast cells of similar and dissimilar genetic origins.
		Fluorescence measurements of each cell line were made over a wide range of cell concentrations, and the fluorescence per cell was determined from the slope in the linear range of the fluorescence intensity vs cell concentration plot.
		Tryptophan, reduced nicotinamide adenine dinucleotide (phosphate) (NAD(P)H) and flavin adenine dinucleotide (FAD) are present in the epithelial cells (3-6).
	www.findarticles.com /p/articles/mi_qa3931/is_200311/ai_n9312493 (923 words)

	Characterization of Chlorophenol 4-Monooxygenase (TftD) and NADH:Flavin Adenine Dinucleotide Oxidoreductase (TftC) of ...
		for FAD reduction with NADPH as the reductant (33).
		A flavin reductase participating in the generation of the free radical of ribonucleotide reductase.
		FAD is a preferred substrate and an inhibitor of Escherichia coli general NAD(P)H:flavin oxidoreductase.
	jb.asm.org /cgi/content/full/185/9/2786 (4439 words)

	title
		Combines with Phosphoric Acid to form Flavin Mononucleotide (FMN) and Flavin Adenine Dinucleotide (FAD).
		FMN and FAD get hydrogen ions from NAD (Vitamin B3) and other dehydrogenases and pass them into the mitochondrial matrix to become oxydized by oxygen.
		Flavin Adenine Dinucleotide (FAD) is a co-enzyme of the following enzymes:
	my.cybersoup.com /thembi/riboflavin.html (110 words)

	Phenotypic expression of the methylenetetrahydrofolate reductase 677C->T polymorphism and flavin cofactor availability ...
		Thyroid hormones increase the activity of enzymes involved in riboflavin metabolism, particularly riboflavin kinase (RK), and thereby augment the synthesis of flavin adenine dinucleotide (FAD), a cofactor for MTHFR.
		Effects of thyroxine upon biosynthesis of flavin mononucleotide and flavin adenine dinucleotide.
		Riboflavin, flavin mononucleotide, and flavin adenine dinucleotide in human plasma and erythrocytes at baseline and after low-dose riboflavin supplementation.
	www.ajcn.org /cgi/content/full/80/4/1050 (3510 words)

	flavin coenzymes (Site not responding. Last check: 2007-10-08)
		It is made of a flavin ring attached to a ribose sugar.
		Riboflavin is attached to a phosphate to produce flavin mononucleotide (FMN), a coenzyme used as an electron carrier in the electron transport system.
		FMN is attached to an adenine nucleotide to produce flavin adenine dinucleotide (FAD), the electron acceptor for several reactions catalyzed by dehydrogenase enzymes.
	faculty.gvsu.edu /carlsont/mm/proteins/flavin.html (83 words)

	Riboflavin and riboflavin-derived cofactors in adolescent girls with anorexia nervosa -- Capo-chichi et al. 69 (4): 672 ...
		HPLC chromatogram of erythrocyte flavin adenine dinucleotide (FAD), flavin mononucleotide (FMN), and riboflavin in anorexia nervosa patients (A) and control subjects (B).
		FAD, FMN, and riboflavin were detected by spectrofluorometry with an excitation wavelength of 445 nm and an emission wavelength of 530 nm.
		Isolation and sequence of a flavin peptide and evidence for binding at the 8 alpha position.
	www.ajcn.org /cgi/content/full/69/4/672 (4059 words)

	NEJM -- Myeloma with xanthoderma due to an IgG lambdamonoclonal anti-flavin antibody
		Native IgGGar contained 1.45 moles of flavin per mole of IgG, and increased to 2 moles with addition of riboflavin to saturation.
		The flavin was localized to the Fab fragment and was bound to IgGGar with high affinity.
		IgGGar showed strongest affinities for riboflavin, flavin mononucleotide and flavin adenine dinucleotide, and lower affinities for dinitrophenyl derivatives and naphthoquinone.
	content.nejm.org /cgi/content/short/294/4/177 (227 words)

	Botany online: Basic Metabolism - Acceptors of Protons and Electrons - Hydrogen Acceptors
		Other hydrogen-transmitters are flavins, quinones, porphyrins (heme-groups) and several proteins containing metal-ions.
		It should also be mentioned, that FAD and FMN are no nucleotides although their names imply it as the alloxazin ring is not bound to a sugar residue but to an alcohol (ribit, ribitol) instead.
		Among other reactions, flavins take part in the dehydrogenase reactions of the respiratory chain.
	www.biologie.uni-hamburg.de /b-online/e19/19b.htm (568 words)

	flavin adenine dinucleotide - General Practice Notebook (Site not responding. Last check: 2007-10-08)
		Flavin adenine dinucleotide is a coenzyme derived from riboflavin.
		FAD, in common with flavin mononucleotide, has an isoalloxazine ring structure that readily accepts and donates electrons.
		Oxbridge Solutions Ltd® is an independent company owned by the authors which does not receive income from any other organisation or individual.
	www.gpnotebook.co.uk /cache/1550516282.htm (112 words)

	Biology 202: Oxidative Phosphorylation
		In order to control such a large amount of potential energy NADH is not allowed to react directly with O2; the electrons pass through a series of molecules producing a sequence of oxidation/reduction reactions liberating the energy in smaller manageable packets.
		NADH is produced by the dehydrogenases of PDH Complex and of the Krebs (TCA) Cycle; it is also the substrate of NADH Dehydrogenase, one of the primary complexes of mitochondrial electron transport.
		b) Flavin is derived from the vitamin, Riboflavin, and is found in 2 forms: Flavin MonoNucleotide (FMN) and Flavin Adenine Dinucleotide (FAD).
	www.sci.sdsu.edu /classes/biology/bio202/TFrey/OxidativePhos.html (776 words)

	FAD Coenzyme Q
		The structure shown on the left is for FAD and is similar to NAD
		In the form of FMN it is involved in the first enzyme complex 1 of the electron transport chain.
		A FMN (flavin adenine mononucleotide) as an oxidizing agent is used to react with NADH for the second step in the electron transport chain.
	www.elmhurst.edu /~chm/vchembook/595FADcoq.html (361 words)

	MedlinePlus Herbs and Supplements: Riboflavin (vitamin B2) (Site not responding. Last check: 2007-10-08)
		Doxorubicin (Adriamycin®): Doxorubicininhibits the incorporation of riboflavin into FAD (flavin adenine dinucleotide) and FMN (flavin mononucleotide) and may deplete riboflavin levels (133;134;135).
		Phenothiazines inhibit the incorporation of riboflavin into FAD (flavin adenine dinucleotide) and FMN (flavin mononucleotide).
		Homocysteine: Intake of riboflavin may be associated with decreased plasma homocysteine levels, and has been attributed to the riboflavin/FAD (flavin adenine dinucleotide)-dependent enzyme methylene tetrahydrofolate reductase (MTHFR) which plays an important role in maintaining the specific folate coenzyme required to form methionine from homocysteine (169;170;171).
	www.nlm.nih.gov /medlineplus/druginfo/natural/patient-riboflavin.html (4960 words)

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