The assertion it is true that ' the covalent bonds linking distant cysteine amino acid residues in protein tertiary structures .
In the tertiary structure, a protein disulfide isomerase forms a disulfide link between the two -SH groups when two cysteines are placed near together . The disulfide bond can be regarded as a component of the polypeptide of amino acid , which makes up the fundamental structure of proteins , due to its nature .
Cysteine plays a clear role in the tertiary structure of protein s. These residues build disulfide bridges that connect the polypeptide chain fragments , some of which are situated widely apart from one another in terms of their fundamental structure .
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