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'Ligand Binding' in keywords Facet   section ZfN Section C  [X]
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1990 (1)
1988 (1)
1Author    JonathanM. Keske, J.Malcolm Bruce, P. Leslie, D. UttonRequires cookie*
 Title    A New Method of Solvation Analysis: Applications to Quinones  
 Abstract    A new method o f analysis o f the factor contributing to solvation o f small molecules is de­ scribed. A pproxim ations o f the energetic contributions to the entry o f a molecule into water have been derived from partition coefficient data o f solutes and selected derivatives from a multiplicity o f solvents. These include taking separate account energy o f the cost o f introduction o f a molecular cavity in water, the strength o f solute-water dipolar interactions, and the strengths o f hydrogen bond formation with water o f the lone pairs and hydroxylic hydrogens associated with the molecule. In this report the solvation-free energies o f benzoquinone and hydroquinone in water are described. We also consider the solvation o f the sem iquinone anion and show it to be fundamentally different from that o f either the quinone or hydroquinone; this is discussed as a potentiality for selective binding ("solvation") o f quinone, sem iquinone and hydroquinone in sites o f redox catalysis such as those found in the photosynthetic reaction center. 
  Reference    Z. Naturforsch. 45c, 430 (1990); received December 18 1989 
  Published    1990 
  Keywords    Quinone, Ligand Binding, Reaction Centers, Solvation 
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 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-0430.pdf 
 Identifier    ZNC-1990-45c-0430 
 Volume    45 
2Author    J. Paul, E. V. Goldammer, H. R. WenzelRequires cookie*
 Title    Pressure Induced Structural Fluctuations in Hemoglobin, Studied by EPR-Spectroscopy  
 Abstract    A quartz based cavity for pressure dependent EPR measurements on liquid samples allowing pressures up to 0.6GPa was constructed. First investigations with this setup were done on spin labeled horse hemoglobin derivatives both in ferric and ferrous state of oxidation. The second derivative EPR spectra show changes of the label's mobility, which are not correlated with spin state changes of the Fe-porphyrin complex, but which point out structural fluctuations inside the globin protein matrices. 
  Reference    Z. Naturforsch. 43c, 162—166 (1988); received December 22 1987 
  Published    1988 
  Keywords    High-Pressure, Electron Paramagnetic Resonance, Second Harmonic Detection, Liquid Systems, Hemo-Proteins, Structural Fluctuation, Ligand Binding 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0162.pdf 
 Identifier    ZNC-1988-43c-0162 
 Volume    43