期刊
FOOD CHEMISTRY
卷 290, 期 -, 页码 277-285出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2019.03.147
关键词
Shrimp; Trypsin-like protease; Postmortem; Migration; Hepatopancreas; Fluorescein-isothiocyanate labeling trypsin-like; protease; Proteomics
资金
- Modern Agro-industry Technology Research System of China [CARS-48]
Fluorescein-isothiocyanate (FITC) labeled trypsin-like protease was prepared and injected into the hepatopancreas of white shrimp. Different segments of the injected shrimp were analyzed with a fluorescence microscope during storage. FITC-trypsin-like protease can be detected in the first segment of shrimp muscle at day 4, while it cannot be observed in the second segment until day 6. The results showed that trypsin-like protease can migrate from hepatopancreas to the tail portion. Texture profile analysis showed that soybean trypsin inhibitor retarded the softening of the shrimp muscle. The rheological results revealed that the content of myosin heavy chain (MHC) in shrimp muscle was decreased with the extended storage time. Proteomics analysis displayed that trypsin-like protease accelerated the metabolism of postmortem muscle. It can be concluded that trypsin-like protease migrated from the hepatopancreas to the muscle tissue, degraded myofibrillar protein, deteriorated the muscle texture, and eventually leaded to the softening of white shrimp.
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