cystine

简明释义

英[ˈsɪstiːn]美[ˈsɪsˌtɪn]

n. [生化] 胱氨酸；双硫丙氨酸

英英释义

单词用法

同义词

反义词

例句

1.The results indicated that the lysine residues in cytochrome C molecules combine with cystine slowly. It induced the small conformational change of cytochrome C molecules.

实验结果表明，胱氨酸分子与细胞色素C的赖氨酸残基缓慢结合，二者相互作用的最终结果使细胞色素C分子的构象发生了微小的变化。

2.Bakers yeast was modified by cystine and then cross-linked with glutaraldehyde, and the adsorption capability of modified biomass for direct blue in aqueous solution was studied.

用胱氨酸对面包酵母表面进行修饰制成生物吸附剂，以戊二醛为交联剂，研究了该吸附剂对直接蓝的吸附性能、特征及其影响因素。

3.Uses: Suitable for the decolorization of glucose sucrose, maltose and other refined sugar as well as the pigment removal, purification and refining of citric acid, cystine, oil, chemical products.

用途：适用于葡萄糖蔗糖、麦芽糖等糖类的脱色相精制，以及柠檬酸、胱胺酸、油脂、化工产品中大分子色素的去除、提纯和精制。

4.It has been found that extraction is an alternative means for the recovery of L-cystine by removing HC1 and precipitating the said amino acid from hair hydrolytic liquor.

利用胺类萃取盐酸的性能，应用于从毛发水解液中选择性地萃取盐酸，以沉淀及提纯L -胱氨酸。

5.For example, acidic treatments destroy glutamine and asparagine, whereas alkaline treatments destroy cystine, serine and threonine, and produce lysinoalanine and D-amino acids.

例如，酸处理破坏谷氨酸盐和天冬酰胺酸，而碱处理破坏胱氨酸、丝氨酸和苏氨酸，并产生赖氨酞胺丙氨酸和D -氨基酸。

6.From equilibria of HC1 extraction with several solvents, an amine mixture has been considered very effective and selected for detailed study by using feeds with and without L-cystine in solution.

从几种有效溶剂对盐酸的萃取平衡关系，选择叔胺进行详细试验研究，取得有关的萃取数据。

7.Optimum hydrolysis conditions are determined in the extraction of cystine from keratin.

实验确定了从角蛋白中提取胱氨酸的最佳水解终点。

8.The mesomeric reaction of L-cystine is greatly affected by the neutralizing temperature and rate as well as the basicity of neutral agent.

中和温度中和速率和中和剂的碱性强弱对L-胱氨酸的消旋化反应影响极大。

9.The Amino Acid Contents and Nutritional Evaluation in the Cystine Motherliquid Powder;

同时测定尿中的钙和羟脯氨酸的含量。

10.The protein structure of hair is largely composed of cystine, which gives it strength.

头发的蛋白质结构主要由胱氨酸组成，这使其具有强度。

11.In certain metabolic disorders, the levels of cystine in the body can become elevated.

在某些代谢紊乱中，体内的胱氨酸水平可能会升高。

12.Supplementing with cystine may help improve skin elasticity and reduce wrinkles.

补充胱氨酸可能有助于改善皮肤弹性并减少皱纹。

13.Research shows that cystine plays a crucial role in antioxidant defense.

研究表明，胱氨酸在抗氧化防御中发挥着至关重要的作用。

14.A deficiency in cystine can lead to various health issues, including weakened immune response.

缺乏胱氨酸可能导致各种健康问题，包括免疫反应减弱。

作文

Cystine is a naturally occurring amino acid that plays a crucial role in the human body. It is formed when two molecules of cysteine, another amino acid, are joined by a disulfide bond. This unique structure allows cystine">cystine to contribute to the stability and strength of proteins, particularly those found in skin, hair, and nails. Understanding the significance of cystine">cystine is essential, especially in the context of health and nutrition. In our daily diet, we obtain amino acids from various protein sources, including meat, fish, eggs, and legumes. Cysteine, which can be synthesized in the body, is also present in these foods. However, the conversion of cysteine to cystine">cystine is vital for maintaining the proper function of many proteins. For instance, keratin, a key structural protein in our hair and nails, relies on the presence of cystine">cystine for its strength and resilience. Moreover, cystine">cystine has antioxidant properties, which means it helps protect cells from damage caused by free radicals. Free radicals are unstable molecules that can lead to oxidative stress, a condition linked to various diseases, including cancer and heart disease. By neutralizing these harmful molecules, cystine">cystine supports overall health and may reduce the risk of chronic illnesses. In addition to its role in protein structure and antioxidant defense, cystine">cystine is also involved in the synthesis of glutathione, one of the body's most important antioxidants. Glutathione is crucial for detoxification processes and plays a significant role in immune function. A deficiency in cystine">cystine can lead to lower levels of glutathione, potentially compromising the body's ability to fight off infections and remove toxins. Certain medical conditions can affect the metabolism of cystine">cystine. For example, individuals with cystinuria, a genetic disorder, have difficulty reabsorbing cystine">cystine in the kidneys, leading to its accumulation and the formation of kidney stones. This condition highlights the importance of cystine">cystine in the body and the potential health risks associated with its imbalance. In summary, cystine">cystine is an essential amino acid that contributes to protein structure, acts as an antioxidant, and plays a vital role in the synthesis of glutathione. Its significance in health and nutrition cannot be overstated. By ensuring an adequate intake of protein-rich foods, we can support the body's production of cystine">cystine and maintain optimal health. Understanding and appreciating the role of cystine">cystine can empower us to make informed dietary choices that promote well-being and prevent disease.

胱氨酸是一种天然存在的氨基酸，在人体中发挥着至关重要的作用。它是由两个半胱氨酸分子通过二硫键结合形成的。这种独特的结构使得cystine">胱氨酸能够增强蛋白质的稳定性和强度，特别是在皮肤、头发和指甲中。理解cystine">胱氨酸的重要性尤其在健康和营养的背景下显得尤为重要。 在我们的日常饮食中，我们从各种蛋白质来源中获取氨基酸，包括肉类、鱼类、鸡蛋和豆类。半胱氨酸可以在体内合成，也存在于这些食物中。然而，将半胱氨酸转化为cystine">胱氨酸对于维持许多蛋白质的正常功能至关重要。例如，角蛋白是我们头发和指甲中的一种关键结构蛋白，它依赖于cystine">胱氨酸的存在来增强其强度和韧性。 此外，cystine">胱氨酸具有抗氧化特性，这意味着它有助于保护细胞免受自由基造成的损害。自由基是不稳定的分子，可能导致氧化应激，这种状态与多种疾病相关，包括癌症和心脏病。通过中和这些有害分子，cystine">胱氨酸支持整体健康，并可能降低慢性疾病的风险。 除了在蛋白质结构和抗氧化防御中的作用外，cystine">胱氨酸还参与谷胱甘肽的合成，谷胱甘肽是体内最重要的抗氧化剂之一。谷胱甘肽对解毒过程至关重要，并在免疫功能中发挥重要作用。cystine">胱氨酸的缺乏可能导致谷胱甘肽水平降低，从而可能妨碍身体抵御感染和清除毒素的能力。 某些医学条件可能会影响cystine">胱氨酸的代谢。例如，患有胱氨酸尿症（cystinuria）的人由于肾脏无法重新吸收cystine">胱氨酸，导致其积累并形成肾结石。这种情况突显了cystine">胱氨酸在体内的重要性以及其不平衡可能带来的健康风险。 总之，cystine">胱氨酸是一种必需的氨基酸，对蛋白质结构、抗氧化剂的作用以及谷胱甘肽的合成具有重要贡献。它在健康和营养中的重要性不容小觑。通过确保摄入足够的富含蛋白质的食物，我们可以支持身体对cystine">胱氨酸的生成，并维持最佳健康。理解和欣赏cystine">胱氨酸的作用可以使我们做出明智的饮食选择，以促进健康和预防疾病。