Structural investigation of cyclic peptidolipids from Bacillus subtilis by high-energy tandem mass spectrometry.
作者： Nathalie Hue , Laurent Serani , Olivier Lapr�vote
DOI: 10.1002/1097-0231(20010215)15:3<203::AID-RCM212>3.0.CO;2-6
关键词:
摘要: The natural products belonging to the surfactin family are cycloheptapeptides bearing a long β-hydroxy-fatty acyl chain at N-terminal position. structure of these compounds, often isolated as complex mixtures, can be elucidated by high-energy tandem mass spectrometry (MS/MS). protonated molecules generated cesium ion bombardment (LSIMS) undergo charge-proximate fragmentations leading b- and y-type series useful for sequence determination. sodium-cationised show radically different behaviour towards collisional activation. Besides well-known charge-remote dissociation alkyl side chain, complete d- w-type fragments allow easy distinction between leucine isoleucine. complementary MS/MS data obtained from cationised prove great interest structural characterisation this type compounds. Copyright © 2001 John Wiley & Sons, Ltd.
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