ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    The arbuscular mycorrhizal fungus, Glomus intraradices, induces the accumulation of cyclohexenone derivatives in tobacco roots (1999)
    Springer
    Planta 207 (1999), S. 620-623 
    Details
    ISSN: 1432-2048
    Keywords: Key words: Arbuscular mycorrhiza ; Blumenol derivative ; Cyclohexenone derivative ; Glomus ; Nicotiana ; Isoprenoid induction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Tobacco (Nicotiana tabacum L.) plants were grown with and without the arbuscular mycorrhizal fungus, Glomus intraradices Schenk & Smith. High-performance liquid chromatographic analyses of methanolic extracts from mycorrhizal and non-mycorrhizal tobacco roots revealed marked fungus-induced changes in the patterns of UV-detectable products. The UV spectra of these products, obtained from an HPLC photodiode array detector, indicated the presence of several blumenol derivatives. The most predominant compound among these derivatives was spectroscopically identified as 13-hydroxyblumenol C 9-O-gentiobioside (“nicoblumin”), i.e. the 9-O-(6′-O-β-glucopyranosyl)-β-glucopyranoside of 13-hydroxy-6-(3-hydroxybutyl)-1,1,5-trimethyl-4-cyclohexen-3-one, a new natural product. This is the first report on the identification of blumenol derivatives in mycorrhizal roots of a non-gramineous plant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004250050526
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Application of H(N)CA,CO-E.COSY experiments for calibrating the φ angular dependences of vicinal couplings J(C′i−1,Hi α), J(C′i−1,Ci β) and J(C′i−1,C′i) in proteins (1997)
    Springer
    Journal of biomolecular NMR 10 (1997), S. 107-118 
    Details
    ISSN: 1573-5001
    Keywords: Vicinal coupling constants ; φ Torsion angle ; Karplus parametrization ; Desulfovibrio vulgaris flavodoxin ; Isotopic labelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A triple-resonance NMR technique suitable for the determination ofcarbonyl-related couplings in polypeptide systems is introduced. Theapplication of three novel pulse sequences to uniformly13C/15N-enriched proteins yields E.COSY-likemultiplet patterns exhibiting either one of the3J(C′i−1,Hi α), 3J(C′i−1,Ci β) and3J(C′i−1,C′i)coupling constants in the indirectly detected 13C′dimension, depending on the passive spin selected. The experiments aredemonstrated with oxidized flavodoxin from Desulfovibrio vulgaris. On thebasis of the J-values measured and the backbone φ-angles derived from ahigh-resolution X-ray structure of the protein, the three associated Karplusequations were reparametrized. The root-mean-square differences between theexperimental coupling constants and those predicted by the optimized Karpluscurves are 0.41, 0.33 and 0.32 Hz for3J(C′i−1,Hi α),3J(C′i−1,Ci β) and3J(C′i−1,C′i),respectively. The results are compared with the Karplus parameters previouslypublished for the same couplings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018355327792
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...