proteins

简明释义

英[ˈprəʊtiːnz]美[ˈproʊtiːnz]

n. [生化]蛋白质（protein 复数）

英英释义

单词用法

同义词

反义词

例句

1.Glucose-free solutions remained clear, but solutions with glucose caused the proteins to form clusters, suggesting that the molecules had become cross-linked.

不含葡萄糖的溶液仍然清晰可见，但含有葡萄糖的溶液会使蛋白质形成团簇，这表明分子已经交联。

2.Please investigate the surface adhesins of Bacteroides forsythus which interact with human salivary proline-rich proteins.

请研究连翘拟杆菌的表面粘附素，该粘附素与人唾液富含脯氨酸的蛋白质相互作用。

3.Many proteins and peptide drugs have to be delivered by injection or a nanoneedle array.

许多蛋白质和肽类药物必须通过注射或纳米针阵列来传递。

4.The primary target of INH is the proteins involved in the biosynthesis of the mycolic acids.

INH的主要目标是参与霉菌酸生物合成的蛋白质。

5.Snake venom is a mixture of proteins, some toxic, poisonous, and some not.

蛇毒是一种蛋白质的混合物，有些有毒，有些没毒。

6.Besides egg whites, drugs made of proteins come in the milk of cows and sheep.

除了蛋白以外，蛋白质制成的药物还来自牛奶和羊奶。

7.Some people may have allergies to certain types of proteins found in food.

有些人可能对食物中某些类型的蛋白质过敏。

8.The body needs proteins for repairing tissues and making enzymes.

身体需要蛋白质来修复组织和制造酶。

9.Eggs are an excellent source of high-quality proteins.

鸡蛋是高质量蛋白质的极佳来源。

10.Many athletes consume extra proteins to help build muscle mass.

许多运动员摄入额外的蛋白质来帮助增加肌肉量。

11.Vegetarians need to ensure they get enough proteins from plant-based sources.

素食者需要确保从植物性来源获取足够的蛋白质。

作文

Proteins are fundamental macromolecules that play a crucial role in the structure and function of all living cells. They are composed of long chains of amino acids, which are the building blocks of life. Each type of protein has a unique sequence of amino acids, which determines its specific shape and function. The word ‘proteins’ refers to these essential molecules that are involved in virtually every cellular process. One of the primary functions of proteins is to serve as enzymes, which are catalysts that speed up biochemical reactions. Without enzymes, many of the chemical reactions necessary for life would occur too slowly to sustain life. For example, digestive proteins, known as enzymes, break down food into smaller molecules that can be absorbed by the body. This is crucial for providing the energy and nutrients our bodies need to function properly.In addition to their role as enzymes, proteins also provide structural support to cells and tissues. For instance, collagen is a type of protein found in connective tissues, skin, and bones, giving them strength and elasticity. Similarly, keratin is another structural protein that makes up hair, nails, and the outer layer of skin. These structural proteins are vital for maintaining the integrity and resilience of our bodies.Moreover, proteins are involved in the transport and storage of molecules. Hemoglobin, a protein found in red blood cells, binds to oxygen in the lungs and transports it to tissues throughout the body. This ability to carry oxygen is essential for cellular respiration, the process by which cells generate energy. Additionally, some proteins serve as storage molecules, holding onto essential nutrients until they are needed by the body.The immune system also heavily relies on proteins. Antibodies are specialized proteins that help defend the body against pathogens such as bacteria and viruses. They recognize and bind to specific antigens, marking them for destruction by other immune cells. This protective role of proteins is vital for maintaining health and preventing illness.Furthermore, proteins play a significant role in cell signaling and communication. Hormones, which are signaling proteins, regulate various physiological processes in the body. For example, insulin is a hormone that helps control blood sugar levels. When we eat, our pancreas releases insulin, allowing cells to take in glucose from the bloodstream. This intricate network of signaling proteins ensures that our bodies respond appropriately to changes in the environment.In conclusion, proteins are indispensable to life, serving a multitude of functions that are essential for health and survival. From facilitating biochemical reactions to providing structural support and enabling communication between cells, the importance of proteins cannot be overstated. A balanced diet rich in proteins is crucial for maintaining overall health, as they are integral to growth, repair, and the proper functioning of our bodies. Understanding the significance of proteins allows us to appreciate the complexity of biological systems and the vital roles these molecules play in our daily lives.

蛋白质是基本的大分子，在所有活细胞的结构和功能中发挥着至关重要的作用。它们由长链氨基酸组成，氨基酸是生命的构建块。每种类型的蛋白质都有独特的氨基酸序列，这决定了其特定的形状和功能。‘蛋白质’这个词指的是这些在几乎所有细胞过程中都参与的重要分子。蛋白质的主要功能之一是作为酶，酶是加速生化反应的催化剂。如果没有酶，许多维持生命所需的化学反应将发生得太慢，无法维持生命。例如，消化酶是一种蛋白质，它将食物分解成小分子，以便身体吸收。这对提供我们身体正常运作所需的能量和营养至关重要。除了作为酶的角色，蛋白质还为细胞和组织提供结构支持。例如，胶原蛋白是一种存在于结缔组织、皮肤和骨骼中的蛋白质，为它们提供强度和弹性。同样，角蛋白是另一种结构蛋白，构成头发、指甲和皮肤的外层。这些结构蛋白对于维持我们身体的完整性和韧性至关重要。此外，蛋白质还参与分子的运输和储存。血红蛋白是一种存在于红细胞中的蛋白质，它在肺部与氧结合，并将其运输到全身各个组织。这种携带氧气的能力对于细胞呼吸至关重要，细胞呼吸是细胞产生能量的过程。此外，一些蛋白质作为储存分子，保持必需营养素，直到身体需要它们。免疫系统也严重依赖蛋白质。抗体是专门的蛋白质，帮助保护身体免受细菌和病毒等病原体的侵害。它们识别并结合特定抗原，将其标记为其他免疫细胞的破坏对象。蛋白质的这种保护作用对于维持健康和预防疾病至关重要。此外，蛋白质在细胞信号传递和沟通中也发挥着重要作用。激素是信号蛋白，调节身体中的各种生理过程。例如，胰岛素是一种帮助控制血糖水平的激素。当我们进食时，胰腺释放胰岛素，使细胞能够从血液中摄取葡萄糖。这种信号蛋白的复杂网络确保我们的身体对环境变化做出适当反应。总之，蛋白质对生命至关重要，承担着多种功能，对于健康和生存不可或缺。从促进生化反应到提供结构支持，再到使细胞之间的沟通成为可能，蛋白质的重要性不容小觑。均衡饮食中富含蛋白质对维持整体健康至关重要，因为它们对生长、修复和我们身体的正常运作至关重要。理解蛋白质的重要性让我们更好地欣赏生物系统的复杂性以及这些分子在我们日常生活中所扮演的重要角色。