The single polypeptide chain is folded into three parts, with the active site at their conjunction. In the active enzyme, the side chain of His 64 is in a position consistent with the formation of ...

THE amphoteric ionic behaviour, one of the characteristics of proteins, has been considered to be due to the presence of the amino- and the carboxyl-groups in the side-chains of the polypeptide chain.

Amino acids are joined together by peptide bonds to form polypeptide chains. The sequence of amino acids in a protein, known as its primary structure, is determined by the genetic code. This sequence ...