氧化应激
细胞色素
细胞色素c
化学
还原电位
线粒体
氧气
氧化磷酸化
细胞色素b
生物化学
活性氧
食品科学
线粒体DNA
酶
无机化学
基因
有机化学
作者
Yiling Ke,Rachel Mitacek,Ann Abraham,G. Mafi,D. L. VanOverbeke,Udaya DeSilva,Ranjith Ramanathan
标识
DOI:10.1021/acs.jafc.7b01735
摘要
Mitochondria play a significant role in beef color. However, the role of oxidative stress in cytochrome c release and mitochondrial degradation is not clear. The objective was to determine the effects of display time on cytochrome c content and oxidation–reduction potential (ORP) of beef longissimus lumborum (LL) and psoas major (PM) muscles. PM discolored by day 3 compared with LL. On day 0, mitochondrial content and mitochondrial oxygen consumption were greater in PM than LL. However, mitochondrial content and oxygen consumption were lower (P < 0.05) in PM than LL by day 7. Conversely, cytochrome c content in sarcoplasm was greater on days 3 and 7 for PM than LL. There were no significant differences in ORP for LL during display, but ORP increased for PM on day 3 when compared with day 0. The results suggest that muscle-specific oxidative stress can affect cytochrome c release and ORP changes.
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