Formation of Arginine Modifications in a Model System of <i>N</i><sup>α</sup>-<i>tert</i>-Butoxycarbonyl (Boc)-Arginine with Methylglyoxal
作者:Antje Klöpfer、Robert Spanneberg、Marcus A. Glomb
DOI:10.1021/jf103116c
日期:2011.1.12
preparative high-performance liquid chromatography (HPLC). Structures were verified by nuclearmagneticresonance (NMR) and high-resolution mass spectrometry. 2-Amino-5-(2-amino-4-hydro-4-methyl-5-imidazolinone-1-yl)pentanoic acid (3) was determined as the key intermediate precursor within the total reaction scheme. Kineticstudies identified Nδ-(5-methyl-4-oxo-5-hydroimidazolinone-2-yl)-l-ornithine and
Model Studies on the Influence of High Hydrostatic Pressure on the Formation of Glycated Arginine Modifications at Elevated Temperatures
作者:Nadja Alt、Peter Schieberle
DOI:10.1021/jf050615l
日期:2005.7.1
using ninhydrin detection. On the basis of the use of eight synthesized reference compounds known in the literature as posttranslational arginine modifications, first, the presence of several glycated amino acids could be excluded. On the other hand, N5-[[(1-carboxyethyl)amino]iminomethyl]ornithine [N7-(1-carboxyethyl)arginine; N7-CEA; 12] was identified as a previously unknown arginine modification