<i>Allium</i> Chemistry: Synthesis, Natural Occurrence, Biological Activity, and Chemistry of <i>Se</i>-Alk(en)ylselenocysteines and Their γ-Glutamyl Derivatives and Oxidation Products
作者:Eric Block、Marc Birringer、Weiqin Jiang、Tsukasa Nakahodo、Henry J. Thompson、Paul J. Toscano、Horst Uzar、Xing Zhang、Zongjian Zhu
DOI:10.1021/jf001097b
日期:2001.1.1
selenocystine (4). Oxidation of 6d gives 2-[(E,Z)-1-propenylseleno]propanal (36). These oxidations occur by way of selenoxides, detected by chromatographic and spectroscopic methods. The natural occurrence of many of the Se-alk(en)ylselenocysteines and their gamma-glutamyl derivatives and oxidation products is discussed. Three homologues of the potent cancer chemoprevention agents 6a and 6c, namely
Dual 5′ Cap Labeling Based on Regioselective RNA Methyltransferases and Bioorthogonal Reactions
作者:Josephin M. Holstein、Fabian Muttach、Stephan H. H. Schiefelbein、Andrea Rentmeister
DOI:10.1002/chem.201604816
日期:2017.5.2
three‐enzyme cascade reaction for their in situ production. Subsequent labeling by using bioorthogonal click reactions provided access to double labeling with identical fluorophores or dual labeling with two different reporter groups, as exemplified by a Cy5 dye, a FRET pair, and a fluorophore/biotin combination. Our dual‐labeling strategy addresses the need for increased sensitivity and should improve