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Study Guides Proteins - Study Guide Proteins Proteins are...

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Study Guide: Proteins Proteins are the most structurally and functionally variable macromolecules in living things. Know the different kinds of amino acids distinguished by their R-group (side chain) properties. Know that primary structure sets forth the other levels of structure in a polypeptide / protein. What is an enzyme? Name some and their location and specific function in cells / organisms. An enzyme is any of numerous complex proteins that are produced by living cells and catalyze specific biochemical reactions at body temperatures. Enzymes are needed for all body functions. They are found in every organ and cell in the body, including in the: blood, intestinal fluids, mouth (saliva), and stomach (gastric juices). Describe in a fundamental way the function of enzymes and how that relates to structure of the enzyme. Enzymes are the catalyst that begins a body function in the body such as clotting blood. Name some structural /support proteins and their location and function in cells / organisms. Structural Proteins - are fibrous and stringy and provide support. Examples include keratin, collagen, and elastin. Keratins strengthen protective coverings such as hair, quills, feathers, horns, and beaks. Collagens and elastin provide support for connective tissue such as tendons and ligaments. Name some transport proteins (not membrane embedded) and their location and function in cells / organisms. Transport Proteins - are carrier proteins, which move molecules from one place to another around the body. Examples include hemoglobin and cytochromes. Hemoglobin transports oxygen through the blood. Cytochromes operate in the electron transport chain as electron carrier proteins. Name some transport proteins that are embedded in membranes and their function in cells/organisms.
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