Postmortem changes in actomyosin dissociation, myofibril fragmentation and endogenous enzyme activities of grass carp (Ctenopharyngodon idellus) muscle

卷:197

Wang, Daoying ; Zhang, Muhan ; Deng, Shaoying ; Xu, Weimin ; Liu, Yuan ; Geng, Zhiming ; Sun, Chong ; Bian, Huan ; Liu, Fang

Jiangsu Acad Agr Sci

关键词: Actomyosin dissociation;    Myofibril fragmentation;    Endogenous enzyme activities;    Grass carp;   

DOI  :  10.1016/j.foodchem.2015.10.132

学科分类：食品科学和技术

【 摘 要 】

The changes of actomyosin, proteolytic activities and myofibril fragmentation during the postmortem aging of grass carp were studied. The study revealed dramatically increased actomyosin dissociation within 6 h of storage postmortem in grass carp, and it was associated with the drop of pH from 6.9 to 6.7, while liberated actin remained almost unchanged after 6 h postmortem. The myofibril fragmentation also increased significantly with the storage time in 6 h, and a highly positive correlation (P < 0.01) existed between MFI and cathepsin B, D, H activities. The study indicated both actomyosin dissociation and cathepsin B, D, H played a role in postmortem tenderization and textural changes in grass carp. (C) 2015 Elsevier Ltd. All rights reserved.