| Literature DB >> 28796497 |
Yiling Ke1, Rachel M Mitacek1, Anupam Abraham1, Gretchen G Mafi1, Deborah L VanOverbeke1, Udaya DeSilva1, Ranjith Ramanathan1.
Abstract
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.Entities:
Keywords: beef color; metmyoglobin reducing activity; mitochondria; myoglobin; oxidation−reduction potential
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Year: 2017 PMID： 28796497 DOI： 10.1021/acs.jafc.7b01735
Source DB: PubMed Journal: J Agric Food Chem ISSN： 0021-8561 Impact factor: 5.279