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  • 1
    Electronic Resource
    Electronic Resource
    A consensus Porphyromonas gingivalis promoter sequence (2000)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 186 (2000), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: We have determined the transcription start points (tsp) for recently identified Porphyromonas gingivalis W50 genes, kgp, rgpA, rgpB (formerly designated prtK, prtR, and prtRII respectively), fetB and the mcmAB operon. Alignment of the DNA upstream of these tsp and those from the literature has enabled us to identify consensus sequences that may represent a P. gingivalis promoter. There is a potential −10 hexamer sequence, 5′-TATATT-3′ centred on average at −10/11 nt which is repeated at −19/20 nt and an upstream consensus, 5′-CAGAT(A/G)-3′ which is centred at −39/40 nt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2000.tb09094.x
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of gene dosage and autoregulation of the regulatory genes INO2 and INO4 on inositol/choline-repressible gene transcription in the yeast Saccharomyces cerevisiae (1997)
    Springer
    Current genetics 31 (1997), S. 462-468 
    Details
    ISSN: 1432-0983
    Keywords: Key words Transcriptional regulation ; Phospholipid biosynthesis ; Saccharomyces cerevisiae ; INO2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Expression of structural genes of phospholipid biosynthesis in yeast is mediated by the inositol/choline-responsive element (ICRE). ICRE-dependent gene activation, requiring the regulatory genes INO2 and INO4, is repressed in the presence of the phospholipid precursors inositol and choline. INO2 and, to a less extent, INO4 are positively autoregulated by functional ICRE sequences in the respective upstream regions. However, an INO2 allele devoid of its ICRE functionally complemented an ino2 mutation and completely restored inositol/choline regulation of Ino2p-dependent reporter genes. Low-level expression of INO2 and INO4 genes, each under control of the heterologous MET25 promoter, did not alter the regulatory pattern of target genes. Thus, upstream regions of INO2 and INO4 are not crucial for transcriptional control of ICRE-dependent genes by inositol and choline. Interestingly, over-expression of INO2, but not of INO4, counteracted repression by phospholipid precursors. Possibly, a functional antagonism between INO2 and a negative regulator is the key event responsible for repression or de-repression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002940050231
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  • 3
    Electronic Resource
    Electronic Resource
    The pentafunctional FAS1 gene of yeast: its nucleotide sequence and order of the catalytic domains (1986)
    Springer
    Molecular genetics and genomics 203 (1986), S. 479-486 
    Details
    ISSN: 1617-4623
    Keywords: Multifunctional enzyme ; Cluster gene ; Nucleotide sequence ; Yeast transformation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary FAS1, the structural gene of the pentafunctional fatty acid synthetase subunit β in Saccharomyces cerevisiae has been sequenced. Its reading frame represents an intronfree nucleotide sequence of 5,535 base pairs, corresponding to a protein of 1,845 amino acids with a molecular weight of 205,130 daltons. In addition to the coding sequence, 1,468 base pairs of its 5′-flanking region were determined. S1 nuclease mapping revealed two transcriptional initiation sites, 5 and 36 base pairs upstream of the translational start codon. Within the flanking sequences two TATATAAA boxes, several A-rich and T-rich blocks and a TAG-...TATGTT...TATGTT...TTT sequence were found and are discussed as transcriptional initiation and termination signals, respectively. The order of catalytic domains in the cluster gene was established by complementation of defined fas1 mutants with overlapping FAS1 subclones. Acetyl transferase (amino acids 1–468) is located proximal to the N-terminus of subunit β, followed by the enoyl reductase (amino acids 480–858), the dehydratase (amino acids 1,134–1,615) and the malonyl/palmityl transferase (amino acids 1,616–1,845) domains. One major inter-domain region of about 276 amino acids with so far unknown function was found between the enoyl reductase and dehydratase domains. The substrate-binding serine residues of acetyl, malonyl and palmityl transferases were identified within the corresponding domains. Significant sequence homologies exist between the acyl transferase active sites of yeast and animal fatty acid synthetases. Similarly, a putative sequence of the enoyl reductase active site was identified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422073
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  • 4
    Electronic Resource
    Electronic Resource
    Particle Size Analysis of Some Difficult Measurable SystemsPaper presented at the 4th meeting “Granulometrie” 1985 at Dresden. (1986)
    Weinheim : Wiley-Blackwell
    Particle and Particle Systems Characterization 3 (1986), S. 163-167 
    Details
    ISSN: 0934-0866
    Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Knowledge of the granulometric behaviour of dispersed systems is vital for a full and complete characterisation. Despite the variety of methods and devices which have been developed for this purpose, difficulties frequently arise in the practical determination of particle size distribution. In this paper it is shown, by means of examples, how measurements for surface modified and porous particles can be influenced by the behaviour of the material, and which approaches exist to obtain accurate values by taking this into account.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ppsc.19860030405
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  • 5
    Electronic Resource
    Electronic Resource
    Über die Mechanische Aktivierung von Calciumcarbonat (1969)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 369 (1969), S. 41-47 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Calcite is activated mechanically. Equilibrium pressure of thermal dissociation, enthalpy of solution, particle size, lattice distortion and free surface are determined. The increase of equilibrium pressure on mechanical activation is caused essentially by augmenting the disordered state of lattice. - ΔH, ΔG and ΔS are calculated from the equilibrium pressures. These values are decreasing with increasing time of activation. - Longtime grinding of calcite and aragonite too leads to an enantiotropic transformation until a mechanochemical equilibrium is reached.
    Notes: Calcit wird mechanisch aktiviert. Von den einzelnen Chargen werden Zersetzungs-gleichgewichtsdruck, Löseenthalpie, Primärteilchengröße, Gitterstörungen und freie Oberfläche bestimmt. Der Anstieg des Gleichgewichtsdruckes mit der mechanischen Aktivierung wird im wesentlichen durch die Erhöhung des Unordnungszustandes des Gitters verursacht. - Aus den Gleichgewichtsdrucken werden ΔH, ΔG und ΔS berechnet, die mit steigender Aktivierungszeit kleiner werden. - Langzeitmahlungen von Calcit und auch Aragonit führen zu einer enantiotropen Umwandlung bis zu einem mechanochemischen Gleichgewicht.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19693690107
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