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Influence of the amino acid composition on the ionization efficiencies of small peptides

机译:氨基酸组成对小肽电离效率的影响

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Electrospray ionization is widely used to generate gas phase ions from a variety of molecules ranging from small ions to large proteins, while the ionization mechanism is claimed to depend on the size of the molecule. For small molecules, the ionization efficiency, the amount of gas phase ions produced in the electrospray process, depends on the properties of the compound. Here, we show that the amino acid composition also influences the ionization efficiency of the oligopeptide. Additionally, we show that the ionization efficiencies of oligopeptides consisting of more than five amino acid residues are very similar to one another, and assuming equal ionization efficiencies is feasible. Therefore, accurate ionization efficiency predictions are needed mainly for small oligopeptides. For these oligopeptides, the amino acid composition can be used to estimate the ionization efficiency in an easy to use manner.
机译:电喷雾电离广泛用于从各种分子产生气相离子,该分子范围从小离子到大蛋白质,而要求离子化机制取决于分子的大小。 对于小分子,电离效率,电喷雾过程中产生的气相离子量取决于化合物的性质。 在这里,我们表明氨基酸组合物也影响寡肽的电离效率。 另外,我们表明,由多于五个氨基酸残基组成的寡肽的电离效率彼此非常相似,并且假设等电离效率是可行的。 因此,需要精确的电离效率预测,主要用于小寡肽。 对于这些寡肽,氨基酸组合物可用于易于使用的方式来估计电离效率。

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