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Proteins are one of the most structurally complicated molecules known. Constructed from the same set of 20 amino acids, they are all polymers. Polymers of amino acids are called polypeptides. ... A protein is first started with amino acids. Having 2 amino acids positioned with the carboxyl group of one is adjacent to the amino group of the other; they would be joined together by an enzyme that catalyzes a dehydration reaction. ... And soon a polypeptide chain is formed and on one end of the chain is a free carboxyl group (C-terminus) and the other is a free amino group (N-terminus). ... The appendages are side chains of the amino acids. Polypeptides can range from a few monomers to thousand or more and each polypeptide has it own unique sequence of amino acids. ...
There are 4 levels of proteins: Primary structure, secondary structure, tertiary structure, and quaternary structure. The unique sequence of amino acids is the primary structure.
Approximate Word count = 757
Approximate Pages = 3
(250 words per page double spaced)
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