title: Postmortem changes in actomyosin dissociation, myofibril fragmentation and endogenous enzyme activities of grass carp (Ctenopharyngodon idellus) muscle.
abstract: 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.
authors.affiliation: Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
authors.forename: Daoying
authors.initials: D
authors.lastname: Wang
authors.affiliation: Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
authors.forename: Muhan
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
authors.forename: Shaoying
authors.initials: S
authors.lastname: Deng
authors.affiliation: Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China. Electronic address: weiminxu2002@aliyun.com.
authors.forename: Weimin
authors.initials: W
authors.lastname: Xu
authors.affiliation: College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, PR China. Electronic address: yliu@shou.edu.cn.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Geng
authors.affiliation: Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
authors.forename: Chong
authors.initials: C
authors.lastname: Sun
authors.affiliation: Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
authors.forename: Huan
authors.initials: H
authors.lastname: Bian
authors.affiliation: Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
authors.forename: Fang
authors.initials: F
authors.lastname: Liu
mesh_terms: D000205:Actomyosin / Q000737:chemistry*; D000818:Animals; D002347:Carps; D002401:Cathepsin B / Q000737:chemistry; D029941:Fish Proteins / Q000737:chemistry*; D008460:Meat / Q000032:analysis*; D018482:Muscle, Skeletal / Q000737:chemistry* / Q000201:enzymology; D009210:Myofibrils / Q000737:chemistry* / Q000201:enzymology; D011180:Postmortem Changes
chemical_list: D029941:Fish Proteins; D000205:Actomyosin; D002401:Cathepsin B
keywords: Actomyosin dissociation; Endogenous enzyme activities; Grass carp; Myofibril fragmentation