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Citation: She Yi-Min, Xiong Xiao-Hong, Zhou Li;Liu Shu-Ying, . Characteristic Fragmentations of [MH-CO₂H₂]⁺ in Two Kinds of Amino Acid[J]. Acta Physico-Chimica Sinica, ;1997, 13(03): 252-257. doi: 10.3866/PKU.WHXB19970313 shu

Characteristic Fragmentations of [MH-CO₂H₂]⁺ in Two Kinds of Amino Acid

1.
Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022

Corresponding author: ,
Received Date: 16 September 1996
Available Online: 15 March 1997

Unimolecular fragmentations of metastable ions [MH-CO2H2]+ in leucine (Leu) and isoleucine (Ile) were studied by electron impact (EI) ionization and fast atom bombardment (FAB) ionization. The different characteristic fragment ions resulted from the collision-induced dissociation (CID) spectra of [MH-CO2H2]+ ions in isomeric amino acids were observed. Deuterium labelling experiment was used to demonstrate the behaviour of the dissociation of [MH-CO2H2]+ion, and the possible fragment mechanisms involving intermediary ion/neutral complexes or proton-bound complexes were proposed and discussed.
- Collision-induced dissociation,
- Ion/neutral complex,
- Leucine,
- Isoleucine
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Characteristic Fragmentations of [MH-CO2H2]+ in Two Kinds of Amino Acid

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通讯作者: 陈斌, bchen63@163.com

Characteristic Fragmentations of [MH-CO₂H₂]⁺ in Two Kinds of Amino Acid