一种新型的串联质谱断裂方式——电子捕获解离,以其完全不同于其他串联质谱肽段断裂的机理,提供了全新的肽段序列标签。它集众多优点于一身:对蛋白质和多肽的主链断裂无偏好;高断裂覆盖度;优先断裂二硫键;保留翻译后修饰基团;中性丢失少、可区分亮氨酸和异亮氨酸等。这些特点使电子捕获解离充满魅力,特别在Top Down技术和翻译后修饰中具有广阔的应用前景。
Electron capture dissociation provides whole new kinds of peptides tags for its mechanism which is absolutely different from other tandem mass spectrometry's. It has many advantages, more random cleavage, extensive sequence coverage, preferential fragmentation of S-S band, few neutral loss, preserving labile posttranslational modification, distinguishing Ile with Leu. All of these make ECD charming, especiallyin the field of Top Down strategy and post translational modification characterization.