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Digitale Medien

IR vibrational CD in alanyl tripeptide: Indication of a stable solution conformer (1989)

Lee, O. ; Roberts, G. M. ; Diem, M.

New York : Wiley-Blackwell

Biopolymers 28 (1989), S. 1759-1770

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Details

ISSN: 0006-3525

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Infrared vibrational CD (VCD) of a small peptide, L-alanyl-L-alanyl-L-alanine (Ala3), and a peptide model, N-acetyl-L-alanine-N′-methyl-amide (AAMA), in the 1550-1750-cm-1 region has been observed. The “coupled oscillator” VCD feature observed for Ala3 in the amide I region is interpreted in terms of a solution structure stabilized by the electrostatic interaction of the zwitterionic groups. No such interactions are possible in basic aqueous solution of Ala3 nor in AAMA in neutral solution. Thus, the coupled oscillator features are lost in the latter two cases, indicating the absence of a simple stabilized conformation.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/bip.360281009

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