The invention relates to biomarkers, and to novel biological markers for diagnosing cancer. In particular, the invention relates to the use of these compounds as diagnostic and prognostic markers in assays for detecting cancer, such as oesophagogastric cancer, and corresponding methods of detection. The invention also relates to methods of determining the efficacy of treating these diseases with a therapeutic agent. The assays are qualitative and/or quantitative, and are adaptable to large-scale screening and clinical trials.
Monosaccharide permethylation products for gas chromatography - mass spectrometry: how reaction conditions can influence isomeric ratios
作者:Daniel Derbie Asres、Hélène Perreault
DOI:10.1139/v97-166
日期:1997.10.1
Methylation analysis has been widely used for determination of carbohydrate structures by mass spectrometry. Permethylation of monosaccharides yields mixtures of anomeric pyranosides and furanosides. This paper discusses the influence of some of the permethylation reaction parameters on the proportions of isomeric products obtained. The ratios of three five- and six-membered ring products obtained