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蛋白质组学在生鲜肉肉色变化机制研究中的应用 总被引:2,自引:2,他引:0
肉色是影响消费者购买欲望的最直观因素。宰后生鲜肉肉色的变化机制和肉色改善一直是肉类科学领域研究的热点。肉色体系复杂,其稳定性受动物宰前因素、从肌肉向可食用肉转化过程和宰后商业流通链条件等因素的影响。目前,仍有许多影响途径和作用机制不够清楚。研究者已采用蛋白质组学技术发现了许多与肉色相关的蛋白标志物和可能影响途径。该文基于近年的研究,综述了不同处理条件下与肉色相关的差异蛋白,主要包括结构性蛋白中的肌动蛋白、肌球蛋白和肌联蛋白,以及肌浆蛋白中的伴侣蛋白、热休克蛋白、代谢酶类和氧化还原酶类等,分析了差异蛋白表达对肉色的影响及其表达调控肉色体系的可能机制,为今后肉色变化机制的研究和肉色稳定性的调控提供了思路。 相似文献
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基于稳态空间分辨光谱的猪肉肌红蛋白检测方法 总被引:1,自引:0,他引:1
The objective of this work was to determine the concentration of myoglobin in fresh pork meat and establish a fast non-invasive method using steady spatially-resolved spectroscopy (SRS). The concentration of myoglobin was calculated based on absorbance coefficients at 640, 760, 800, 850 nm. The results showed that the value of myoglobin using SRS was significantly correlated (r2=0.955) to traditional methods with the accuracy of 3.6%F.S. The results showed that the concentration of myoglobin can be measured by using near infrared steady spatially-resolved spectroscopy. 相似文献
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响应面法优化提纯牛肉肌红蛋白 总被引:1,自引:0,他引:1
以牛背肌肉为原料,筛选Tris-HCl复合提取液pH、提取液浓度、提取时间、料液比、硫酸铵溶液饱和度等对肌红蛋白提取有影响的因素,并从中选出具有显著影响的因素(提取液pH、提取液浓度、硫酸铵溶液饱和度)进行响应面优化试验,确定牛肉肌红蛋白提取最优工艺参数提取液pH为8.15、硫酸铵溶液饱和度90.93%、提取时间1.63 h。对粗提蛋白进行纯化及层析交换分离,得到纯度较高的肌红蛋白含量2.14 mg/mL,总蛋白浓度2.39 mg/mL,样品纯度达到91.95%。 相似文献
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Comparsion of the Effects of Succinate and NADH on Postmortem Metmyoglobin Redcutase Activity and Beef Colour Stability 下载免费PDF全文
GAO Xiao-guang ;WANG Zhen-yu ;TANG Meng-tian ;MA Chang-wei ;DAI Rui-tong 《农业科学学报》2014,13(8):1817-1826
In two experiments, the effects of succinate and NADH(reduced nicotinamide adenine dinucleotide) on metmyoglobin reductase activity and electron transport chain-linked metmyoglobin reduction were investigated and compared. In experiment 1, metmyoglobin(MetMb), substrate and inhibitors were incubated with mitochondria. Comparsion of the effects of succinate and NADH on MetMb reduction was investigated. The MetMb percentage in sample treated with 8 mol L-1 succinate decreased by about 69% after 3 h incubation, and the effect was inhibited by the addition of 10 mol L-1 electron transfer chain complex II inhibitor malonic acid; the MetMb percentage in samples treated with 2 mol L-1 NADH decreased by 56% and the effect was inhibited by the addition of 0.02 mol L-1 electron transport chain complex I inhibitor rotenone. These results indicated that electron transport chain played an important role in MetMb reduction. Both complex II and complex I take part in the MetMb reduction in mitochondria through different pathways. NADH-MetMb reduction system was less stable than succinateMetMb system. In experiment 2, the beef longissimus dorsi muscle was blended with different concentrations of succinate or NADH. Enhancing patties with higher concentration of succinate or NADH improved colour stability in vacuum packaged samples(P〈0.05). These results verified that mitochondria electron transport chain is related to the MetMb reduction in meat system. 相似文献
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影响牛肉肉色稳定性的主要生化因子 总被引:3,自引:1,他引:2
【目的】探讨影响不同部位的牛肉肉色稳定性差异的主要生化因素。【方法】从8头牛胴体上分别取背最长肌、半膜肌和腰大肌,在0-4℃冷藏7 d,每隔1 d分别测定肉色、色素含量、pH、MDA含量、NADH浓度、乳酸脱氢酶和高铁肌红蛋白还原酶活性等指标。【结果】背最长肌在整个冷藏期间的a*值最高且变化最小,MDA含量最少,NADH浓度、乳酸脱氢酶和高铁肌红蛋白还原酶活性最高,肉色最稳定;半膜肌居中,而腰大肌的a*值最小,变化最显著,MDA含量最高,NADH浓度、乳酸脱氢酶和高铁肌红蛋白还原酶活性最低,肉色最不稳定。【结论】牛肉肉色稳定性与其NADH浓度、乳酸脱氢酶和高铁肌红蛋白还原酶活性显著相关(P<0.05)。 相似文献
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铁是动物机体必需微量元素之一,是构成血红素、肌红蛋白、细胞色素等的组成部分.因此,在养猪生产中一定要注意给猪补好铁.现将富马酸亚铁在养猪生产中的应用介绍如下. 相似文献