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  • Chemistry  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 6 (1977), S. 32-37 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Phosphate frequencies for eight nucleoside 3′,5′- and four nucleoside 2′, 3′-cyclic monophosphates have been determined by Raman and infrared spectroscopy based on comparisons with modified cyclic nucleotides and model cyclic phosphates. To a first approximation the symmetric diester stretching frequency, νs(OPO), is determined by the OPO bond angle. However, substitution on the phosphate ring also affects the frequency and intensity of νs(OPO). These results are discussed in terms of the use of νs(OPO) to determine the degree of backbone order in polynucleotides.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 9 (1980), S. 304-307 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The Raman spectra of bovine pancreatic α-chymotrypsin and trypsin were determined from 7% aqueous solutions and lyophilized solids containing residual sulfate ion. A large amount of β-pleated-sheet structure is present in both molecules, as shown by the contour of the amide III region, but trypsin contains substantially more α-helical conformation than does chymotrypsin. There is evidence of some change in structure of both molecules in solution as compared with the solids. The tyrosines are all or nearly all weakly hydrogen bonded in both enzymes, and the binding of sulfate ion is also weak in the lyophilized solids.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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