Structure determination of a ceramide pentadecasaccharide by two-dimensional J-resolved and J-correlated NMR spectroscopy |
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| Authors: | Janusz Dabrowski Peter Hanfland |
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| Affiliation: | 1. Max-Planck-Institut für Medizinische Forschung, 6900 Heidelberg FRG;2. Institut für Experimentelle Hämatologie und Bluttransfusionswesen der Universität Bonn, 5300 Bonn, FRG |
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| Abstract: | The photo-induced electron spin resonance signal of the primary donor P840+ in unit membrane fractions of the title photosynthetic bacterium was measured. Bacteria containing natural isotopic abundances and 82% 13C-enrichment were examined. Second moment analysis of the lineshape of the 13C-enriched P840+ signal shows that P840+ consists of two bacteriochlorophyll a-type macrocycles. The data thus obtained are independent of difficulties in interpreting either peak-to-peak linewidths or ENDOR data with respect to intermolecular spin delocalization. |
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| Keywords: | NMR nuclear magnetic resonance 2D two-dimensional interproton coupling constant δ SECSY spinecho correlated spectroscopy NOE nuclear Overhauser effect, or enhancement |
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