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Identified as alpha helices and beta sheets, these stable folding patterns make up the secondary structure of a protein. Most proteins contain various helices and sheets, in addition to other less common patterns . The ensemble of formations and folds in a single linear chain of amino acids — often called a polypeptide — constitutes the tertiary structure of a protein. Finally, the quaternary structure of a protein refers to those macromolecules with several polypeptide chains or subunits. If you have a sensitivity to lactose, you could knowledge gas, bloating, cramps, fatigue, headaches and irritability soon after consuming whey protein....