نتایج جستجو برای: azido iodination

تعداد نتایج: 2968  

Journal: :Journal of physics 2023

Abstract In this study, the alumina layer on surface of aluminum powder was removed with hydrofluoric acid. 2-Azido-1,3-dimethylimidazolinium Hexafluorophosphate (ADMHFP) and 4-azido-2,3,5,6-tetrafluorobenzoic acid (ATFBA) were coated to form Al@ADMHFP Al@ATFBA. Scanning electron microscope FTIR test results proved that ADMHFP ATFBA powder. The Al@ATFBA showed better thermal reaction combustion...

Journal: :The Journal of biological chemistry 1977
T C Chiu J A Babitch

The topographical arrangement of chick synaptosomal plasma membrane polypeptides was examined by lactoperoxidase-catalyzed iodination and trypsin digestion of proteins exposed at the exterior surface. The ““I-labeling profile on sucrose gradients of lysed, subfractionated synaptosomes generally coincided with the activity of the membrane marker (Na+-K+)-activated ATPase, which suggested that la...

Journal: :Biochemical Journal 1964

Journal: :The Journal of biological chemistry 1989
R A Clark D W Pearson

Human serum apotransferrin was exposed to the isolated myeloperoxidase-H2O2-halide system or to phorbol ester-activated human neutrophils. Such treatment resulted in a marked loss in transferrin iron binding capacity as well as concomitant iodination of transferrin. Each component of the cell-free system (myeloperoxidase, H2O2, iodide) or neutrophil system (neutrophils, phorbol ester, iodide) w...

Journal: :The Journal of biological chemistry 1984
A M Kleinschmidt H G Martinson

We have studied the functional properties of iodinated histones. Isolated, denatured histones were iodinated at trace levels and then renatured together with carrier histones and high molecular weight DNA to form nucleohistone. Nucleosomes were prepared from the reconstitute using micrococcal nuclease, and the relative representations of the individual iodinated tyrosines of the histones in the...

Journal: :The Journal of biological chemistry 2002
Tong Xie Linda Yu Martin W Bader James C A Bardwell Chang-An Yu

Disulfide bond (Dsb) formation is catalyzed in the periplasm of prokaryotes by the Dsb proteins. DsbB, a key enzyme in this process, generates disulfides de novo by using the oxidizing power of quinones. To explore the mechanism of this newly described enzymatic activity, we decided to study the ubiquinone-protein interaction and identify the ubiquinone-binding domain in DsbB by cross-linking t...

Journal: :The Journal of biological chemistry 1987
S G Powers-Lee K Corina

8-Azido-ATP has been found to serve as a photoaffinity label for two distinct ATP sites on rat liver carbamoyl phosphate synthetase I and to allow preliminary localization of these sites. In the dark, 8-azido-ATP acted as a competitive inhibitor with respect to ATP. Ultraviolet irradiation of carbamoyl phosphate synthetase I in the presence of 8-azido-ATP led to an irreversible loss of activity...

Journal: :Nature chemical biology 2009
Shixin Ye Thomas Huber Reiner Vogel Thomas P Sakmar

We demonstrate the site-directed incorporation of an IR-active amino acid, p-azido-L-phenylalanine (azidoF, 1), into the G protein-coupled receptor rhodopsin using amber codon suppression technology. The antisymmetric stretch vibration of the azido group absorbs at approximately 2,100 cm(-1) in a clear spectral window and is sensitive to its electrostatic environment. We used FTIR difference sp...

2007
Xiaohong Liu Hazuki Takahashi Yoko Harada Tsukasa Ogawara Yuta Ogimura Yoshiyuku Mizushina Mineo Saneyoshi Toyofumi Yamaguchi

Telomerase adds telomeric DNA repeats to the ends of linear chromosomal DNA. 3'-Azido-3'-deoxythymidine 5'-triphosphate (AZTTP) is a known telomerase inhibitor. To obtain more selective and potent inhibitors that can be employed as tools for studying telomerase, we investigated the telomerase-inhibitory effects of purine nucleosides bearing a 3'-down azido group: 3'-azido-2',3'-dideoxyguanosine...

Hassan Azizi Reza Ranjbar-Karimi,

Some aryl and heteroaryl azido compounds were synthesized from the reaction of corresponding fluoro and chloro compounds with sodium azide in DMF as solvent and under various reaction conditions especially ultrasonic irradiation. Reaction of aromatic and heteroaromatic azido compound with thioacetic acid in the presence of sodium hydrogen carbonate and in methanol as solvent led to the differen...

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