scholarly journals Prooxidative chain transfer activity by thiol groups in biological systems

Redox Biology ◽  
2020 ◽  
Vol 36 ◽  
pp. 101628 ◽  
Author(s):  
Sascha Kunath ◽  
Mario Schindeldecker ◽  
Antonio De Giacomo ◽  
Theresa Meyer ◽  
Selina Sohre ◽  
...  
2004 ◽  
Vol 37 (12) ◽  
pp. 4441-4452 ◽  
Author(s):  
Lillian Hutson ◽  
Julia Krstina ◽  
Catherine L. Moad ◽  
Graeme Moad ◽  
Gregory R. Morrow ◽  
...  

Author(s):  
Hojeong Yoon ◽  
Seongchul Park ◽  
Manho Lim

Cysteine and N-acetylated cysteine derivatives are ubiquitous in biological systems; they have thiol groups that bind NO to form S-nitrosothiols (RSNOs) such as S-nitrosocysteine (CySNO), S-nitroso-N-acetylcysteine (NacSNO), and S-nitroso-N-acetylpenicillamine (NapSNO)....


1977 ◽  
Vol 50 (4) ◽  
pp. 641-649 ◽  
Author(s):  
A. H. Weinstein

Abstract A number of substituted symmetrical dithiodiphenols and related monothio-and trithiodiphenols were prepared and characterized. Some of these dithiodiphenols showed chain transfer activity either in bulk styrene or in emulsion diene polymerizations. The fact that phenolic sulfide units were incorporated into polyisoprene and polybutadiene by use of one of these compounds, 2,2′-dithiobis(6-t-butyl-p-cresol), as chain transfer agent was confirmed by ultraviolet analysis. It was demonstrated that selfresistance to oxidation was incorporated into various diene homo- or copolymers, to varying degree, by use of some of these dithiodiphenols as chain transfer agents, on the basis of oxygen absorption tests on preextracted polymers.


2015 ◽  
Vol 290 (48) ◽  
pp. 28708-28723 ◽  
Author(s):  
David C. Briggs ◽  
Holly L. Birchenough ◽  
Tariq Ali ◽  
Marilyn S. Rugg ◽  
Jon P. Waltho ◽  
...  

1996 ◽  
Vol 29 (24) ◽  
pp. 7717-7726 ◽  
Author(s):  
Catherine L. Moad ◽  
Graeme Moad ◽  
Ezio Rizzardo ◽  
San H. Thang

1990 ◽  
Vol 24 (5) ◽  
pp. 501-505 ◽  
Author(s):  
Gordon F. Meijs ◽  
Ezio Rizzardo ◽  
San H. Thang

Author(s):  
Henry S. Slayter

Electron microscopic methods have been applied increasingly during the past fifteen years, to problems in structural molecular biology. Used in conjunction with physical chemical methods and/or Fourier methods of analysis, they constitute powerful tools for determining sizes, shapes and modes of aggregation of biopolymers with molecular weights greater than 50, 000. However, the application of the e.m. to the determination of very fine structure approaching the limit of instrumental resolving power in biological systems has not been productive, due to various difficulties such as the destructive effects of dehydration, damage to the specimen by the electron beam, and lack of adequate and specific contrast. One of the most satisfactory methods for contrasting individual macromolecules involves the deposition of heavy metal vapor upon the specimen. We have investigated this process, and present here what we believe to be the more important considerations for optimizing it. Results of the application of these methods to several biological systems including muscle proteins, fibrinogen, ribosomes and chromatin will be discussed.


Author(s):  
Nicholas J Severs

In his pioneering demonstration of the potential of freeze-etching in biological systems, Russell Steere assessed the future promise and limitations of the technique with remarkable foresight. Item 2 in his list of inherent difficulties as they then stood stated “The chemical nature of the objects seen in the replica cannot be determined”. This defined a major goal for practitioners of freeze-fracture which, for more than a decade, seemed unattainable. It was not until the introduction of the label-fracture-etch technique in the early 1970s that the mould was broken, and not until the following decade that the full scope of modern freeze-fracture cytochemistry took shape. The culmination of these developments in the 1990s now equips the researcher with a set of effective techniques for routine application in cell and membrane biology.Freeze-fracture cytochemical techniques are all designed to provide information on the chemical nature of structural components revealed by freeze-fracture, but differ in how this is achieved, in precisely what type of information is obtained, and in which types of specimen can be studied.


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