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測量應(yīng)用案例-20190805

來源:美國布魯克海文儀器公司   2019年08月07日 09:37  

文獻名: Effects of l-arginine and l-histidine on heat-induced aggregation of fish myosin: Bighead carp (Aristichthys nobilis)

 

作者: Ruichang Gaoa,b, Tong Shia, Quancai Suna, Xiuting Lib, David Julian McClementsc, Li Yuana

aSchool of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China

bBeijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University, Beijing 100048, China

cDepartment of Food Science, University of Massachusetts Amherst, Amherst, MA 01003, USA

 

摘要:This research focused on the effects of l-arginine (l-Arg) and l-histidine (l-His) on the heat-induced aggregation of fish myosin. l-Arg/l-His increased the pH of the myosin solution from 6.82 to 8.74 and 7.24, respectively, and decreased the turbidity, aggregate size, shear modulus, and breaking force. The incorporation of l-Arg/l-His decreased the surface hydrophobicity during setting, but increased it during the two-step heating. The heat-induced aggregation of myosin was suppressed by both amino acids, with the inhibitory effect being greater for l-Arg than l-His. On one hand, the change in the pH played a critical role in suppressing the heat-induced aggregation of myosin. On the other hand, the characteristics of l-Arg/l-His themselves, such as net charges and particular R-groups, were another main contributor to aggregation suppression. Particularly, l-Arg/l-His could interact with exposed aromatic residues of myosin, and the interactions may dominate and overwhelm the burial of aromatic residues during two-step heating.

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