title: Effects of tea polyphenols on the post-mortem integrity of large yellow croaker (Pseudosciaena crocea) fillet proteins.
abstract: Tea polyphenols (TP) are known to be important for the post-mortem deterioration of fish muscle and can enhance food quality. To shed light on the influence of TP on the status of large yellow croaker muscle proteins, control and treated fillets (0.1% TP, 0.2% TP and 0.3% TP, w/v) were analysed periodically for myofibrillar protein functional properties (Ca(2+)-ATPase activity, surface hydrophobicity, total sulfhydryl content, emulsion stability index and rheological behaviour). Degradation of the myofibrillar protein myosin could be clearly observed; several proteins were also observed to vary in abundance following post-mortem storage for 25 days. The present study offers new evidence that TP have an effective impact on muscle protein integrity post-mortem.
authors.affiliation: Zhejiang Marine Food Processing Quality Control Techniques and Instrumentation Engineering Laboratory, College of Life Science, China Jiliang University, Hangzhou 310018, China. zhaojin@cjlu.edu.cn
authors.forename: Jin
authors.initials: J
authors.lastname: Zhao
authors.forename: Weijin
authors.initials: W
authors.lastname: Lv
authors.forename: Jinlin
authors.initials: J
authors.lastname: Wang
authors.forename: Jianrong
authors.initials: J
authors.lastname: Li
authors.forename: Xiaoxiang
authors.initials: X
authors.lastname: Liu
authors.forename: Junli
authors.initials: J
authors.lastname: Zhu
mesh_terms: D000251:Adenosine Triphosphatases / Q000032:analysis; D000818:Animals; D028241:Camellia sinensis / Q000737:chemistry*; D005396:Fish Products / Q000032:analysis*; D029941:Fish Proteins / Q000737:chemistry*; D005519:Food Preservation / Q000379:methods*; D005520:Food Preservatives / Q000494:pharmacology*; D057927:Hydrophobic and Hydrophilic Interactions; D009124:Muscle Proteins / Q000737:chemistry*; D009132:Muscles / Q000737:chemistry / Q000187:drug effects / Q000201:enzymology; D010473:Perciformes / Q000378:metabolism; D010936:Plant Extracts / Q000494:pharmacology*; D059808:Polyphenols / Q000494:pharmacology*; D055550:Protein Stability / Q000187:drug effects
chemical_list: D029941:Fish Proteins; D005520:Food Preservatives; D009124:Muscle Proteins; D010936:Plant Extracts; D059808:Polyphenols; D000251:Adenosine Triphosphatases
keywords: Food quality; Large yellow croaker; Protein functional properties; Tea polyphenols; Two-dimensional gel electrophoresis