What connections are involved in the formation of the primary structure of the protein?

A covalent bond, or more precisely, a peptide bond, is involved in the formation of the primary structure of a protein. The peptide bond is formed by the carboxyl group (COOH) of one amino acid and the amino group (-NH2) of the second amino acid. This is how a dipeptide is formed, which is elongated in the same way. This is how the primary structure (chain) of AA is formed in the protein.



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