Stable-Isotope Dimethylation Labeling Combined with LC−ESI MS for Quantification of Amine-Containing Metabolites in Biological Samples
作者:Kevin Guo、Chengjie Ji、Liang Li
DOI:10.1021/ac0704356
日期:2007.11.1
was found that deuterium labeling causes an isotopeeffect on the elution of labeled amines on RPLC but has no effect on HILIC LC. However, 13C-dimethylation does not show any isotopeeffect on either RPLC or HILIC LC, indicating that 13C-labeling is a preferred approach for relative quantification of amine-containing metabolites in different samples. The isotopicallylabeled 35 amine-containing analogues
Direct Copper(III) Formation from O<sub>2</sub> and Copper(I) with Histamine Ligation
作者:J. Brannon Gary、Cooper Citek、Timothy A. Brown、Richard N. Zare、Erik C. Wasinger、T. Daniel P. Stack
DOI:10.1021/jacs.6b05538
日期:2016.8.10
the oxygenation of histamine-ligated copper(I) complexes is demonstrated here, indicating that copper(III) is a viable oxidation state in such products from both kinetic and thermodynamic perspectives. At low temperatures, both trinuclear Cu(II)2Cu(III)O2 and dinuclear Cu(III)2O2 predominate, with the distribution dependent on the histamine ligand structure and oxygenation conditions. Kinetics studies