What is protein?
Proteins are part of every cell, tissue, and organ in our bodies. These body proteins are constantly being broken down and replaced. The protein in the foods we eat is digested into amino acids that are later used to replace these proteins in our bodies. Protein is found in the following foods: • meats, poultry, and fish • legumes (dry beans and peas) • tofu • eggs • nuts and seeds • milk and milk products • grains, some vegetables, and some fruits (provide only small amounts of protein relative to other sources) As we mentioned, most adults in the United States get more than enough protein to meet their needs. It’s rare for someone who is healthy and eating a varied diet to not get enough protein.
A protein is a long train of amino acids linked together. Proteins have different functions; they can provide structure (ligaments, fingernails, hair), help in digestion (stomach enzymes), aid in movement (muscles), and play a part in our ability to see (the lens of our eyes is pure crytalline protein). Protein is a long chain molecule made up of amino acids joined by peptide bonds. Protein forms the structural material of bodily tissues. Proteins, the principal constituents of the protoplasm of all cells, are of high molecular weight and consist essentially of combinations of a amino acids in peptide linkages. Twenty different amino acids are commonly found in proteins and each protein has a unique, genetically defined amino acid sequence which determines its specific shape and function. They serve as enzymes, structural elements, hormones, immunoglobulins, etc. And are involved in oxygen transport, muscle contraction, electron transport and other activities throughout the body and in
Nutrients (raw materials) are chemical substances found in foods. Essential nutrients are those that the body cannot make or is unable to make in the amount it needs. The 50 or so essential nutrients people need can be grouped into 6 basic categories and include protein, carbohydrates, fat, vitamins, minerals, and water. Chemically, carbon, nitrogen, sulfur, oxygen and hydrogen atoms make up proteins. Protein molecules are usually long chains. About half the organic material in your body is protein. Proteins help build and repair our bodies. They make up muscles, organs, and some hormones. Protein also helps your body by making hemoglobin, the part of the red blood cell that carries oxygen to all of your other cells. Protein also makes antibodies, the cells that help your body fight off infection and disease. People usually think that you have to eat meat to get protein. Thats not true. Protein IS in meat, but it’s also in seaweed, nuts, eggs, and beans. Its also in cheese and other da
