Mass spectrometry: m/z 1983-2008.

Position of ester groups in the lipid A backbone of lipopolysaccharides obtained from Salmonella typhimurium.

Lipopolysaccharides extracted from the heptoseless mutant of Salmonella typhimurium G30/C21 were hydrolyzed with either 0.1 N HCl at 100 degrees C or treated twice with 20 mM sodium acetate, pH 4.5, at 100 degrees C for 45 min and finally purified by preparative thin layer chromatography to yield a structural series of mono- and diphosphoryl lipid A, respectively. Positive ion fast atom bombard...

The biosynthesis of plant steryl glycosides and saponins.

Rose, M. E. & Johnstone, R. A. W. (1982) Mass Spectrometry for Chemists and Biochemisfs, Cambridge University Press, Cambridge Rose, M. E., Prescott, M. C., Wilby, A. H. & Galpin, I. J. (1983~) Biomed. Mass Spectrom. in the press Rose, M. E., Veares, M. P., Lewis, I. A. S. & Goad, L. J. (19836) Biochem. Soc. Trans. 11,602-603 Rose, M. E., Longstaff, C. & Dean, P. D. G. (1983~) Biomed. Mass Spec...

Mass spectrometry for the characterization of unsulfated chondroitin oligosaccharides from 2-mers to 16-mers. Comparison with hyaluronic acid oligomers.

This study reports for the first time the complete liquid chromatography/electrospray ionization mass spectrometry (LC/ESI-MS) and tandem mass spectrometry (MS/MS) analyses performed in negative ion mode of saturated unsulfated chondroitin oligosaccharides up to 16-mers and comparison with hyaluronic acid (HA) oligomers differing only in the nature of the hexosamine residue. MS/MS of the chondr...

Direct radioimmunoassay and gas chromatography-mass spectrometry compared for determination of melatonin in plasma.

Formation of N-ethylmaleimide (NEM)-glutathione conjugate and N-ethylmaleamic acid revealed by mass spectral characterization of intracellular and extracellular microbial metabolites of NEM.

The extracellular and intracellular metabolites formed upon exposure of activated sludge microorganisms to a sublethal concentration of N-ethylmaleimide were monitored by liquid chromatography with ion trap mass spectrometry. The metabolite N-ethylsuccinimido-S-glutathione (m/z 433) was converted rapidly to N-(2-oxoethyl)-2,2-(propionylamino)propanamide (m/z 187) and N-ethylmaleamic acid (m/z 1...