title: Application of 2D-TOCSY NMR to the measurement of specific(13C-enrichments in complex mixtures of 13C-labeled metabolites.
abstract: A 2D-NMR method based on zero-quantum filtered (ZQF-) TOtal Correlation SpectroscopY (TOCSY) was applied to measure 13C-enrichments in complex mixtures of 13C-labeled metabolites generated in carbon-labeling experiments. Using ZQF-TOCSY, more than 30 13C-enrichments could be potentially measured from the analysis of a biomass hydrolyzate prepared from Escherichia coli cells grown on a mixture of 20% [U-13C]-glucose and 80% [1-13C]-glucose, without need for separation of metabolites. The method is applicable to biomass hydrolyzates, cell extracts, and other complex biological samples. It is also applicable to any combination of labeled substrates and provides a basis for examining non-steady-state conditions.
authors.affiliation: MetaSys, Laboratoire d'Ingénierie des Systèmes Biologiques et Procédés, UMR INSA/CNRS 5504 INRA 792, LBB/INSA, 135 Avenue de Rangueil, 31077 Toulouse Cedex 4, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Massou
authors.forename: Cécile
authors.initials: C
authors.lastname: Nicolas
authors.forename: Fabien
authors.initials: F
authors.lastname: Letisse
authors.forename: Jean-Charles
authors.initials: JC
authors.lastname: Portais
mesh_terms: D018533:Biomass; D002247:Carbon Isotopes / Q000737:chemistry; D004926:Escherichia coli / Q000737:chemistry*; D005947:Glucose / Q000032:analysis* / Q000737:chemistry; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D012680:Sensitivity and Specificity
chemical_list: D002247:Carbon Isotopes; D005947:Glucose