化学
酰胺
明胶
三螺旋
傅里叶变换红外光谱
红外光谱学
变性(裂变材料)
结晶学
傅里叶变换
吸收带
螺旋(腹足类)
分析化学(期刊)
谱线
光谱学
立体化学
有机化学
光学
核化学
数学分析
生态学
物理
数学
量子力学
天文
生物
蜗牛
作者
K. J. Payne,Arthur Veis
出处
期刊:Biopolymers
[Wiley]
日期:1988-11-01
卷期号:27 (11): 1749-1760
被引量:546
标识
DOI:10.1002/bip.360271105
摘要
Abstract The ir spectra of lathyritic rat skin collagen and calf skin gelatin solutions at a variety of temperatures were obtained using Fourier transform ir spectroscopy and a 9‐reflection, 2‐pass ZnSe prism sample cell. The spectra were then deconvolved (based on Kauppinnen's method) and the behavior of the amide I band at ∼ 1650 cm −1 observed in detail. Throughout the temperature range studied (4–50°C), three component absorption peaks within the amide I band (at 1633, 1643, and 1660 cm −1 ) are common to the spectra irrespective of the degree of triple helix content of the sample. Changes in the relative intensities of these component peaks are, however, conformationally dependent. During denaturation of the triple helix, the dominant 1660‐cm −1 component in the native collagen spectrum diminishes and the 1633‐cm −1 peak becomes relatively intensified. The inherently strong basicity of the carbonyl group of the proline residues together with the frequent occurrence of this imino acid in the X position of the Gly‐X‐Y triplet of collagen largely accounts for the −30‐cm −1 shift of the amide I band during denaturation. Temperature and conformationally dependent changes in the fine structure of the amide I band from dilute solutions of collagen can be monitored in a reproducible and quantitative fashion.
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