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Second Harmonic Generation from Tyrosine Containing Peptides

机译:含有酪氨酸肽的二次谐波产生

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The Second Harmonic Generation (SHG) response from Tyrosine-containing peptides at the air-water interface is presented. First, the quadratic hyperpolarizability of the aromatic amino acid Tyrosine obtained by Hyper Rayleigh Scattering is reported, demonstrating its potentiality as an endogenous molecular probe for SHG studies. Then, the single Tyrosine antimicrobial peptide Mycosubtilin is monitored at the air-water interface and compared to another peptide, Surfactin, lacking a Tyrosine residue. Adsorption kinetics and polarization analysis of the SHG intensity for the peptide monolayers clearly demonstrate that the SHG response from Mycosubtilin arises from Tyrosine. Besides, it confirms that indeed Tyrosine can be targeted as an endogenous molecular probe.
机译:提出了一种来自空水界面处的含酪氨酸肽的第二谐波产生(SHG)响应。首先,据报道,通过超瑞利散射获得的芳族氨基酸酪氨酸的二次超渗透性,证明其作为SHG研究的内源分子探针的潜力。然后,在空气界面监测单个酪氨酸抗微生物肽霉菌霉素,与另一个肽,缺乏酪氨酸残基相比。肽单层的SHG强度的吸附动力学和极化分析清楚地证明了来自酪氨酸的菌丝杆菌的SHG反应。此外,它证实了确实可以靶向酪氨酸作为内源性分子探针。

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