Modern proteomics requires reagents for exact quantification of peptides in complex mixtures. Peptide labelling is most typically achieved with isobaric tags that consist of a balancer and a reporter part that separate in the gas phase. An ingenious distribution of stable isotopes provides multiple reagents with identical molecular weight but a different mass of the reporter groups, allowing relative
[EN] SULFOXIDE-BASED REAGENT FOR MASS SPECTROMETRY<br/>[FR] RÉACTIF À BASE DE SULFOXYDE POUR SPECTROMÉTRIE DE MASSE
申请人:UNIV MUENCHEN LUDWIG MAXIMILIANS
公开号:WO2019048450A1
公开(公告)日:2019-03-14
The present invention relates to sulfoxide-based reagents suitable in the mass spectrometric determination of analyte molecules such as peptides as well as adducts of such reagents and analyte molecules and applications of said reagents and adducts. Further, the present invention relates to methods for the mass spectrometric determination of analyte molecules.
Enantioselective Syntheses of α-Fmoc-Pbf-[2-<sup>13</sup>C]-<scp>l</scp>-arginine and Fmoc-[1,3-<sup>13</sup>C<sub>2</sub>]-<scp>l</scp>-proline and Incorporation into the Neurotensin Receptor 1 Ligand, NT<sub>8−13</sub>
作者:Chuanjun Song、Satita Tapaneeyakorn、Annabel C. Murphy、Craig Butts、Anthony Watts、Christine L. Willis
DOI:10.1021/jo9014497
日期:2009.12.4
Enantioselective syntheses of selectively labeled, orthogonally protected [2-C-13]L-arginine and [1,3-C-13(2)]-L-proline are described from the commercially available precursors [2-C-13]bromoacetic acid and potassium [C-13]cyanide, Interestingly the enhanced signal assigned to C-2 in the C-13 NMR spectrum of alpha-Fmoc-Pbf-[2-C-13]-L-arginine was very broad at room temperature. The two Fmoc-labeled amino acids were used to prepare [2-C-13]-Arg9 and [1,3-C-13(2)]-Pro 10 labeled ligand (NT8-13) by manual Fmoc-SPSS.