The primary structure of a protein is the unique sequence of amino acids in its polypeptide chain, determined by the genetic code. This sequence dictates the protein's final 3D structure and function, making it fundamental to understanding protein biology.

Protein Primary Structure

primary structure of a protein

unique sequence of amino acids

A polypeptide chain is a single, linear sequence of amino acids linked by peptide bonds, forming the primary structure of proteins. It folds into specific three-dimensional shapes, determining the protein's function and interactions within biological systems.

polypeptide chain

The genetic code is a set of rules by which information encoded in genetic material (DNA or RNA sequences) is translated into proteins by living cells. It is universal across almost all organisms, highlighting the shared evolutionary heritage of life on Earth.

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