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| - Composed of amino acids, proteins perform myriad essential functions for the body including supplying energy and building and repairing tissues. Proteins are obtained from both animal and vegetable sources including eggs, fish and meat.
- At the beginning structure, Primary Structure, proteins look like just strings. At the second stage, Secondary Structure, they start folding, and coiling, forming two types of protein ingredients. One abundant part of proteins is called the Alpha Helix. Alpha Helices are common in proteins. They look like a spiral.. The other part is the Beta Sheet or Beta Pleated Sheet. They are large, thick arrows that represent the direction of where the chain is facing. One of the enzymes containing many Beta Sheets is the HIV-1 Protease. File:Beta Sheet.png
- Proteins are broken down in the stomach during digestion by enzymes known as proteases into smaller polypeptides to provide amino acids for the organism, including the essential amino acids that the organism cannot biosynthesize itself. Aside from their role in protein synthesis, amino acids are also important nutritional sources of nitrogen.
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| abstract
| - At the beginning structure, Primary Structure, proteins look like just strings. At the second stage, Secondary Structure, they start folding, and coiling, forming two types of protein ingredients. One abundant part of proteins is called the Alpha Helix. Alpha Helices are common in proteins. They look like a spiral.. The other part is the Beta Sheet or Beta Pleated Sheet. They are large, thick arrows that represent the direction of where the chain is facing. One of the enzymes containing many Beta Sheets is the HIV-1 Protease. At the third stage, Tertiary Structure, there are interactions with the unfolded parts of the protein/enzyme. Quaternary Structures are many Tertiary Structures combined into one chain. An example of this is also Hemoglobin, made up of 4 subunits. File:Beta Sheet.png
- Composed of amino acids, proteins perform myriad essential functions for the body including supplying energy and building and repairing tissues. Proteins are obtained from both animal and vegetable sources including eggs, fish and meat.
- Proteins are broken down in the stomach during digestion by enzymes known as proteases into smaller polypeptides to provide amino acids for the organism, including the essential amino acids that the organism cannot biosynthesize itself. Aside from their role in protein synthesis, amino acids are also important nutritional sources of nitrogen. Proteins, like carbohydrates, contain 4 kilocalories per gram as opposed to lipids which contain 9 kilocalories and alcohols which contain 7 kilocalories. The liver, and to a much lesser extent the kidneys, can convert amino acids used by cells in protein biosynthesis into glucose by a process known as gluconeogenesis. The amino acids leucine and lysine are exceptions.
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