Primary structure of protein: The function of a

The function of a protein is highly dependent on its 3D structure. The amino acid sequence of a polypeptide chain determines the final 3D structure of the protein. There are four levels of protein structure; the primary structure, the secondary structure, the tertiary structure, and the quaternary structure. Learn about the primary structure of proteins, which is the sequence of amino acids in a polypeptide chain. Also, explore the secondary, tertiary and quaternary structures of proteins and their formation and examples. Learn about the four levels of protein structure: primary, secondary, tertiary and quaternary. Primary structure is the sequence of amino acids in the polypeptide chain, determined by the gene and influenced by post-translational modifications. Protein primary structure is the linear sequence of amino acids in a peptide or protein. [1] By convention, the primary structure of a protein is reported starting from the amino -terminal (N) end to the carboxyl -terminal (C) end.