FOOD SCIENCE ›› 2006, Vol. 27 ›› Issue (8): 87-90.

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Effects of Ca~(2+)on Heat-induced Gelation of Silver Carp Surimi Gel

 LIU  Hai-Mei, XIONG  Shan-Bai, XIE  Bi-Jun   

  1. College of Food Science and Technology,Huazhong Agricultural University,Wuhan 430070,China
  • Online:2006-08-15 Published:2011-10-14

Abstract:  Effects of different Ca2+ concentrations on gel-forming ability,solubility and MHC of surimi gel were investigated.Calcium ions with low concentration(10,20mmol/kg)activated the endogenous transglutaminase(TGase).TGase catalyzed polymerization of myosin heavy chain(MHC)via formation of ε-(γ-glutamyl)-Lysine non-sulfide covalent bonds,leading to decreasing of solubility and MHC of surmi gel and the increasing of surimi gel-forming ability.The optimum Ca2+ concentration is 20mmol/kg.However,when Ca2+ concentration is 50mmol/kg,cross-links of MHC are inhibited,which cause the decreasing of gel-forming ability and the increasing of solubility of surimi gel.Protein-Ca-protein bridge structure is formed between calcium ions and surimi protein when Ca2+ concentration is up to 80mmol/kg,so surimi gel becomes harder and less elastic.

Key words: surimi, heat-induced gelation, transglutaminase, calcium ion