Physiochem ical changes in m yofibrillar protein from purp leback flying squid Sthenoteuthis oualaniensis in South China Sea during heat-treatment
MA Hai-xia1，MA Jing-rong1，2，YANG Xian-qing1，LILai-hao1
1.Key Laboratory of Aquatic Product Processing，Ministry of Agriculture，National R&D Center for Aquatic Product Processing，South China Sea Fisheries Research Institute，Chinese Academy of Fishery Sciences，Guangzhou 510300，China；2.College of Food Science and Technology，Guangdong Ocean University，Zhanjiang 524088，China
Abstract: The changes in physiochemical properties and SDS-PAGE ofmyofibrillar protein from purpleback flying squid Sthenoteuthis oualaniensis in South China Sea during heat-treatment were studied via turbidity，solubility，Ca2+-ATPase activity and total sulfhydryl content.The results showed that the changes in all the above indicators was inconspicuous at heating temperature of 25-35℃.There were significant changes in turbidity，Ca2+-ATPase activity and total sulfhydryl contentat35℃.The totalsulfhydryl contentwas shown to be increased at40-50℃in short period，and then reduced significantly at 50℃ again，with significant decline in solubility.Myosin heavy chain（MHC）ofmyofibrillar protein from purpleback flying squid in South China Sea showed some degradation as raising temperature，but the paramyosin（PM）and actin remained unchanged basically.At35℃，themyofibrillar protein of purpleback flying squid began to form macromolecular substances and denatured gradually.
马海霞, 马静蓉, 杨贤庆, 李来好. 南海鸢乌贼肌原纤维蛋白加热过程中理化性质的变化[J]. 大连海洋大学学报, 2016, 31(2): 185-189.
MA Hai-xia, MA Jing-rong, YANG Xian-qing, LILai-hao. Physiochem ical changes in m yofibrillar protein from purp leback flying squid Sthenoteuthis oualaniensis in South China Sea during heat-treatment. Journal of Dalian Ocean University, 2016, 31(2): 185-189.
2016, Vol. 31 
