[EN] SUBSTITUTED ACETOPHENOME AS MS REAGENTS<br/>[FR] ACETOPHENONES SUBSTITUEES UTILISEES COMME AGENTS DE SPECTROMETRIE DE MASSE
申请人:AMERSHAM BIOSCIENCES AB
公开号:WO2005110955A1
公开(公告)日:2005-11-24
The invention provides reagents and kits for introducing a fixed charge to the side-chain of methionine, and peptides and proteins containing methionine, for selective identification by tandem mass spectrometry. The reagents are based on substituted acetophenones according to the following formula: The reagents of the present invention may also be used for differential quantitation of peptide concentrations between two different samples, by incorporation of stable isotope labels to the reagent, to yield a 'light' form (containing only natural isotopes), and a 'heavy' form by incorporating stable isotope labels into the substituent. These reagents give a mass difference of at least 8 Daltons and up to 13 Daltons between 'light' and 'heavy' reagents.
该发明提供了用于向蛋氨酸的侧链引入固定电荷的试剂和试剂盒,以及含有蛋氨酸的肽和蛋白质,用于通过串联质谱进行选择性识别。这些试剂基于以下公式的取代苯乙酮:该发明的试剂还可用于在两个不同样本之间的肽浓度差异定量,通过将稳定同位素标记纳入试剂,产生一个“轻”形式(仅含天然同位素),并通过将稳定同位素标记纳入取代物产生一个“重”形式。这些试剂在“轻”和“重”试剂之间提供至少8道尔顿至13道尔顿的质量差异。