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Thermospray and electrospray mass spectrometry of flavocoenzymes. Analysis of riboflavin sulphates from sugar beet

✍ Scribed by J. Abián; S. Susín; J. Abadía; E. Gelpí

Book ID
102984554
Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
694 KB
Volume
302
Category
Article
ISSN
0003-2670

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✦ Synopsis

Thermospray (TSP) liquid chromatography mass spectrometry and electrospray (ESP) mass spectrometry were applied to the analysis of the flavocoenzymes riboflavin (Rfv), riboflavin 5'-monophosphate (FMN) and flavin adenine dinucleotide (FAD). Positive and negative ion spectra are presented. TSP spectra of Rfv and FMN were characterized by the presence of intense and characteristic fragment ions containing the flavin ring whereas in those from FAD, ions containing the adenine moiety predominate. ESP affords mainly molecular weight information as well as some indication of the number of acidic places in these molecules. Application of these techniques to the analysis of root extracts from iron-depleted sugar beet (Beta uulgaris) was instrumental in the characterization of two novel riboflavin compounds, riboflavin 3'-monosulphate (3-FMS) and riboflavin S-monosulphate (S-FMS), as the major flavins in roots.

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