Binding of Aroma Compounds with Myofibrillar Proteins Modified by a Hydroxyl-Radical-Induced Oxidative System

2014 ◽  
Vol 62 (39) ◽  
pp. 9544-9552 ◽  
Author(s):  
Feibai Zhou ◽  
Mouming Zhao ◽  
Guowan Su ◽  
Weizheng Sun
Keyword(s):  
Hydroxyl Radical ◽  
Aroma Compounds ◽  
Myofibrillar Proteins ◽  
Oxidative System

Physicochemical changes of myofibrillar proteins of squid (Argentinus ilex) induced by hydroxyl radical generating system

2019 ◽  
Vol 297 ◽  
pp. 124941 ◽  
Author(s):  
Bhoke Marwa Nyaisaba ◽  
Shaimaa Hatab ◽  
Xinxin Liu ◽  
Yu Chen ◽  
Xuhuan Chen ◽  
...  
Keyword(s):  
Hydroxyl Radical ◽  
Myofibrillar Proteins ◽  
Physicochemical Changes ◽  
Generating System

Influence of sodium pyrophosphate on the physicochemical and gelling properties of myofibrillar proteins under hydroxyl radical-induced oxidative stress

2020 ◽  
Vol 11 (3) ◽  
pp. 1996-2004 ◽  
Author(s):  
Yungang Cao ◽  
Wenhui Ma ◽  
Jiankang Wang ◽  
Shuhua Zhang ◽  
Zhenyu Wang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Hydroxyl Radical ◽  
Rheological Behavior ◽  
Sodium Pyrophosphate ◽  
Myofibrillar Proteins ◽  
Gelling Properties

Sodium pyrophosphate (PP) addition changed the rheological behavior and improved the gelling properties of oxidative stressed myofibrillar proteins (MP).

Activation of cytochrome c to a peroxidase compound I-type intermediate by H2O2: relevance to redox signalling in apoptosis

2004 ◽  
Vol 71 ◽  
pp. 97-106 ◽  
Author(s):  
Mark Burkitt ◽  
Clare Jones ◽  
Andrew Lawrence ◽  
Peter Wardman
Keyword(s):  
Cytochrome C ◽  
Hydroxyl Radical ◽  
Redox Regulation ◽  
Chemotherapeutic Agents ◽  
Tyrosyl Radical ◽  
Compound I ◽  
Definitive Evidence ◽  
Enhanced Production ◽  
Physico Chemical

The release of cytochrome c from mitochondria during apoptosis results in the enhanced production of superoxide radicals, which are converted to H2O2 by Mn-superoxide dismutase. We have been concerned with the role of cytochrome c/H2O2 in the induction of oxidative stress during apoptosis. Our initial studies showed that cytochrome c is a potent catalyst of 2′,7′-dichlorofluorescin oxidation, thereby explaining the increased rate of production of the fluorophore 2′,7′-dichlorofluorescein in apoptotic cells. Although it has been speculated that the oxidizing species may be a ferryl-haem intermediate, no definitive evidence for the formation of such a species has been reported. Alternatively, it is possible that the hydroxyl radical may be generated, as seen in the reaction of certain iron chelates with H2O2. By examining the effects of radical scavengers on 2′,7′-dichlorofluorescin oxidation by cytochrome c/H2O2, together with complementary EPR studies, we have demonstrated that the hydroxyl radical is not generated. Our findings point, instead, to the formation of a peroxidase compound I species, with one oxidizing equivalent present as an oxo-ferryl haem intermediate and the other as the tyrosyl radical identified by Barr and colleagues [Barr, Gunther, Deterding, Tomer and Mason (1996) J. Biol. Chem. 271, 15498-15503]. Studies with spin traps indicated that the oxo-ferryl haem is the active oxidant. These findings provide a physico-chemical basis for the redox changes that occur during apoptosis. Excessive changes (possibly catalysed by cytochrome c) may have implications for the redox regulation of cell death, including the sensitivity of tumour cells to chemotherapeutic agents.

Analysis of buckwheat (Fagopyrum esculentum) aroma compounds with GC-MS

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
D Janež ◽  
D Kantar ◽  
H Prosen ◽  
S Kreft
Keyword(s):  
Aroma Compounds ◽  
Fagopyrum Esculentum
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