The immune system tolerates the colonization of commensal bacteria on the skin with the aid of regulatory T cells during the first few weeks of life, a mouse study shows.
November 9, 2000|
In the November Nature Biotechnology Fiehn et al. offer an alternative to the profiling of messenger RNA and protein levels. They use gas chromatography coupled to mass spectrometry (GC/MS) to assay the relative levels of 326 small compounds from a plant leaf extract (Nat Biotech 2000, 18:1157-1161). A simple methanol extraction is followed by derivitization to increase metabolite stability and volatility. Approximately half of the chromatographed compounds can be identified based on retention t