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手性对脯氨酸取代丝氨酸八聚体的红外光解离光谱的影响。

Chirality effects on proline-substituted serine octamers revealed by infrared photodissociation spectroscopy.

机构信息

State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 300071 Tianjin, China.

出版信息

Phys Chem Chem Phys. 2014 Jan 28;16(4):1554-8. doi: 10.1039/c3cp53469c. Epub 2013 Dec 5.

Abstract

Chiral preferences exist in proline-substituted serine octamers. For ions of [L-Ser6 + Pro2]H(+), the stability preference is [L-Ser6 + L-Pro2]H(+) > [L-Ser6 + D-Pro2]H(+) > [L-Ser6 + L-Pro1 + D-Pro1]H(+). Infrared photodissociation (IRPD) experiments were performed for the observed proline-substituted octamer ions in the range from 2700 to 3750 cm(-1). Chiral differentiation was achieved using the IRPD method, and the progressive changes in IRPD spectra due to the substitution were also reflected.

摘要

脯氨酸取代丝氨酸八聚体存在手性偏好。对于[L-Ser6 + Pro2]H(+)离子,稳定性偏好为[L-Ser6 + L-Pro2]H(+) > [L-Ser6 + D-Pro2]H(+) > [L-Ser6 + L-Pro1 + D-Pro1]H(+)。在 2700 至 3750 cm(-1)范围内进行了观察到的脯氨酸取代八聚体离子的红外光解(IRPD)实验。使用 IRPD 方法实现了手性区分,并且还反映了由于取代引起的 IRPD 光谱的渐进变化。

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