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  • Inorganic Chemistry  (206)
  • Life and Medical Sciences  (11)
  • Industrial Chemistry  (6)
  • Archaebacteria  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 41 (1908), S. 344-356 
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 18 (1885), S. 203-213 
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 19 (1886), S. 164-170 
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 20 (1887), S. 934-941 
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1432
    Keywords: Ribosomal proteins ; Elongation factors ; Nucleotide sequence ; Archaebacteria ; Phylogeny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary By a chromosome walking strategy the DNA region fromMethanococcus vannielii flanking the genes for protein synthesis elongation factor (EF) 1α and EF-2 was cloned and sequenced. A gene organization of 5′-β′-open reading frame (ORF) 1-ORF2-S12-S7-EF-2-EF-1α-S10-ORF3-ORF4-3′ was found where β′, S12, S7, S10, EF-2, and EF-1α represent gene products with sequences similar to the β′ subunit of RNA polymerase, ribosomal proteins S12, S7, and S10, and EF-G and EF-Tu fromEscherichia coli, respectively. ORF1-4 represent gene products with no known eubacterial counterparts. Northern blot analysis of transcripts and nuclease S1 mapping showed that transcription initiates between β′ and ORF1 and terminates at the 3′ side of the S10 gene and that the genes from ORF1 to S10 are contranscribed. Apart from the presence of two additional ORFs, ORF1 and ORF2, and of the gene for S10, this organization is identical to that of the eubacterial “streptomycin operon.” ORF1 displays sequence similarity to rat liver ribosomal protein L30 and may represent one of the “additional” ribosomal proteins ofMethanococcus. The sequenced part of the β′ gene and the EF-2 and EF-1α gene products fromMethanococcus, are more similar to their eukaryotic than to their eubacterial counterparts. It appears, therefore, that the genetic organization of the translational components resembles the situation in eubacteria, whereas their primary structures are more eukaryotic in nature.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-072X
    Keywords: Archaebacteria ; Haloarcula vallismortis ; Glyceraldehyde 3-phosphate dehydrogenase ; Halophilism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Glyceraldehyde 3-phosphate dehydrogenase (EC 1.2.1.12) from the extremely halophilic archaebacterium Haloarcula vallismortis has been purified in a four step procedure to electrophoretic homogeneity. The enzyme is a tetramer with a relative molecular mass of 160000. It is strictly NAD+-dependent and exhibits its highest activity in 2 mol/l KCl at 45°C. Amino acid analysis and isoelectric focusing indicate an excess of acidic amino acids. Two parts of the primary sequence are reported. These peptides have been compared with glyceraldehyde 3-phosphate dehydrogenases from other archaebacteria, eubacteria and eucaryotes. The peptides show a high grade of similarity to glyceraldehyde 3-phosphate dehydrogenase from eucaryotes.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 159 (1993), S. 90-97 
    ISSN: 1432-072X
    Keywords: Archaebacteria ; Halobacterium salinarium ; Glutamine synthetase ; Cytidylylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Glutamine synthetase (GS) was purified to electrophoretic homogeneity from the halophilic archaebacterium Halobacterium salinarium. The enzyme was purified 300-fold to homogeneity with 30% yield. By gel filtration and SDS gel electrophoresis, it was shown that the enzyme has a native molecular weight of 495,000 and a subunit molecular weight of 62,000. This indicates an octameric quaternary structure. The amino acid composition and the isoelectric point of 4.9 are similar to other GSs. The enzyme shows highest stability in 4 M NaCl or KCl and at temperatures up to 45°C. Lower salt concentrations or higher temperatures lead to rapid and irreversible denaturation. By low concentrations of Mg2+ or Mn2+, the salt dependence was decreased and the thermostability increased. Mg2+ or Mn2+ are essential cofactors. The two resulting activities show differences in pH and salt concentrations required for optimal activity, different K m-values and different sensitivity to inhibition by amino acids. The enzyme is not adenylylated like the GS from some eubacteria but cytidylylated. The covalently bound CMP increases Mn2+-and Mg2+-dependent activities at a different extent.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 208 (1987), S. 523-528 
    ISSN: 1617-4623
    Keywords: EF-Tu ; Nucleotide sequence ; Archaebacteria ; Phylogeny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A restriction fragment enrichment procedure was devised for the identification and cloning of the gene for protein synthesis elongation factor Tu (EF-Tu) from Methanococcus vannielii, employing hybridisation with an internal tufB gene probe from Escherichia coli. Methanococcus contains a single tuf gene on its chromosome; it is expressed in E. coli and it codes for a polypeptide of 46.5 kDa. The overall architecture of the protein bears a striking resemblance to that of eukaryotic elongation factor 1α (EF-1α). The close similarity to EF-1α is supported by the sequence homology values which are in the range of 34% to 35% with eubacterial, plastid and mitochondrial EF-Tu sequences and as high as 52% to 54% with those from eukaryotic EF-1α.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 92 (1959), S. 1638-1643 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Umsetzungen von Glucuron- und Galakturonsäure und einigen ihrer Derivate mit Trimethylchlorsilan werden Substanzen erhalten, die i. Vak. gut destillieren und aus denen sich die Ausgangsverbindungen durch Alkoholyse leicht zurückgewinnen lassen. Die Eigenschaften der Trimethylsilylverbindungen werden beschrieben.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 98 (1965), S. 1668-1672 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1-Methyl-2-fluor-β-D-fructose〈2.6〉 bildet mit starkem Alkali 1-Methyl-D-fructosan-α〈2.5〉β〈2.6〉. In Gegenwart von Methanol entstehen außerdem 1-Methyl-methyl-α-D-fructosid〈2.6〉1) und 1-Methyl-methyl-β-D-fructosid〈2.6〉. Die Reaktionsmechanismen für die Bildung des Fructose-anhydrids und der anomeren Methyl-fructoside werden diskutiert.
    Type of Medium: Electronic Resource
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