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A protein chain, or polypeptide chain, is a linear sequence of amino acids linked together by peptide bonds. These chains are the fundamental building blocks of proteins. The specific order of amino acids in a chain is determined by the genetic code of an organism and dictates the protein's unique three-dimensional structure and function.
The formation of a protein chain occurs during a process called translation, where ribosomes read messenger
Once synthesized, a protein chain typically folds into a complex, specific three-dimensional shape. This folding process