期刊
LWT-FOOD SCIENCE AND TECHNOLOGY
卷 78, 期 -, 页码 317-324出版社
ELSEVIER
DOI: 10.1016/j.lwt.2016.12.035
关键词
Common carp; Muscle; ATP-related compounds; Protein degradation; Endogenous enzyme activity
资金
- earmarked fund for China Agriculture Research System [CARS-46]
- National Natural Science Foundation of China [31471683]
- Beijing Natural Science Foundation [6152017]
- Tianjin Project of Transformation and Extension of Agricultural Science and Technology Achievements [201404020]
Postmortem changes in white muscle and dark muscle of common carp (Cyprinus carpio) during 72 h at 4 degrees C were evaluated by determining ATP-related compounds, AMP-deaminase (ADA) activity, acid phosphatase (ACP) activity, pH, texture properties, contents and SDS-PAGE patterns of myofibrillar and sarcoplasmic proteins, as well as activity of cathepsins B and B + L The results showed that white muscle had a significantly (P < 0.05) higher pH and inosine monophosphate (IMP) concentration but a lower hardness after slaughter. Higher activity of ADA and ACP in dark muscle coincided with its higher K value. The SDS-PAGE patterns showed that white muscle contained more protein bands for myofibrillar and sarcoplasmic proteins, while dark muscle had more bands with low molecular weights for sarcoplasmic protein. Cathepsins B and B + L showed higher activity in dark muscle than in white muscle, especially at the later period of storage. Higher activity of endogenous enzymes in dark muscle might contribute to its faster quality loss. (C) 2016 Elsevier Ltd. All rights reserved.
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