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Dissertations / Theses on the topic 'Coenzyme B12'

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1

Jiang, Dong. "Model studies of coenzyme B12 dependent reactions." Thesis, University of Newcastle Upon Tyne, 2010. http://hdl.handle.net/10443/989.

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Coenzyme-B12 dependent glutamate mutase is a radical enzyme, which catalyses the isomerisation of (S)-glutamate to (2S,3S)-3-methylaspartate via enzyme-bound radical intermediates. This is the key step in the fermentation of glutamate to ammonia, carbon dioxide, acetate, butyrate and hydrogen by Clostridium tetanomorphum. It has been proposed that the mechanism of glutamate mutase involves removal of Hsi from glutamate to give a 4-glutamyl radical that undergoes fragmentation to acrylate and a glycine radical. Recombination of these species leads to the 3-methylene-aspartate radical and hence
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2

McIlgorm, E. A. "Transition metal promoted reactions of xanthates, tosylates and related compounds, possibly analogues to the chemistry of the coenzyme, Vitamin B12." Thesis, Queen's University Belfast, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373534.

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3

Lyatuu, Fredrick Edwin [Verfasser], and W. [Akademischer Betreuer] Buckel. "Investigations into the mechanism of the coenzyme B12 dependent reaction catalyzed by glutamate mutase from Clostridium cochlearium / Fredrick Edwin Lyatuu. Betreuer: W. Buckel." Marburg : Philipps-Universität Marburg, 2013. http://d-nb.info/1034420593/34.

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4

Müller, Britta. "Untersuchung der anaeroben Spaltung von Ethern am Beispiel des 2-Phenoxyethanol-Abbaus durch Acetobacterium Stamm LuPhet 1." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-67421.

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5

Toeche-Mittler, Caroline. "Konstruktion eines bakteriellen Systems zum Export von Coenzym B12." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=970344082.

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6

Schaefer, Paul. "Coenzym B12-Katalyse : Versuche zur Frage einer möglichen direkten Beteiligung der 5- resp. 15-Methylgruppen /." [S.l.] : [s.n.], 1993. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10393.

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7

Seifert, Corinna. "Untersuchungen zur Inaktivierung und Reaktivierung der Coenzym B12-abhängigen Glycerin-Dehydratasen aus Citrobacter freundii und Clostridium pasteurianum." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=964198746.

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8

Klopprogge, Corinna. "Untersuchungen zur Inaktivierung und Reaktivierung der Coenzym B12-abhängigen Glycerin-Dehydratasen aus Citrobacter freundii und Clostridium pasteurianum." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=964198746.

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9

Hsu, Huei-Ju, and 許惠茹. "The interaction between glutamate mutase and coenzyme B12 analogs." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/8cjy8j.

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碩士<br>國立臺北科技大學<br>生物科技研究所<br>96<br>Glutamate mutase from Clostridium tetanomorphum is one of a group of adenosylcobalamin(AdoCbl)-dependent mutases which catalyzes the interconversion of L-glutamate and threo-β-methyl-L-aspartate. Glutamate mutase is comprised of two weakly-associating subunits: GlmE(Mr 53,700Da) and MutS(Mr 14,700Da). To further characterize the interactions between glutamate mutase and the coenzyme three different coenzyme B12 analogs, methylcobinamide (MeCbi), adenosylcobinamide (AdoCbi), and adeosylcobinamide-GDP (AdoCbi-GDP), were chemoenzymaticlly synthesized. In this st
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10

Yu, Hsiu-Ting, and 余琇婷. "Studies on coenzyme B12-dependent D-Ornithine 4,5-aminomutase from Clostridium sticklandii." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/dfxj96.

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碩士<br>國立臺北科技大學<br>生物科技研究所<br>96<br>D-Ornithine aminomutase from Clostridium sticklandii catalyzes the 1,2-rearrangement reaction of D-Ornithine to (2R,4S)-2,4-diaminopentanoic acid. The enzyme comprises two subunits, OraS and OraE. Previous studies have shown that OraSE and OraE protein possess proteolytic activities in the presence of certain metal ions. The enzymatic assay method for this activity is established in this study. Site-directed mutagenesis studies of putative metal-binding are also carried out. My results confirm that OraSE belongs to a families of metalloprotease, and its subst
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11

Seifert, Corinna. "Untersuchungen zur Inaktivierung und Reaktivierung der Coenzym B12-abhaengigen Glycerin-Dehydratasen aus Citrobacter freundii und Clostridium pasteurianum." 2001. http://hdl.handle.net/11858/00-1735-0000-0006-AC0F-5.

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12

Knietsch, Anja. "Konstruktion und Durchmusterung von Metagenombanken: Identifizierung und Charakterisierung von Genen und Genprodukten von am Polyol-Stoffwechsel beteiligten Oxidoreduktasen und Coenzym B12-abhängigen Dehydratasen." Doctoral thesis, 2003. http://hdl.handle.net/11858/00-1735-0000-0006-ADC2-7.

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13

Toeche-Mittler, Caroline [Verfasser]. "Konstruktion eines bakteriellen Systems zum Export von Coenzym B12 / vorgelegt von Caroline Toeche-Mittler." 2002. http://d-nb.info/970344082/34.

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14

Klopprogge, Corinna [Verfasser]. "Untersuchungen zur Inaktivierung und Reaktivierung der Coenzym B12-abhängigen Glycerin-Dehydratasen aus Citrobacter freundii und Clostridium pasteurianum / vorgelegt von Corinna Seifert." 2001. http://d-nb.info/964198746/34.

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15

Knietsch, Anja [Verfasser]. "Konstruktion und Durchmusterung von Metagenombanken : Identifizierung und Charakterisierung von Genen und Genprodukten von am Polyol-Stoffwechsel-beteiligten Oxidoreduktasen und Coenzym-B12-abhängigen Dehydratasen / vorgelegt von Anja Knietsch." 2004. http://d-nb.info/970698380/34.

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