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  4. In the structure of proinsulin in humans, disulphide bonds exist

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Q. In the structure of proinsulin in humans, disulphide bonds exist

NTA AbhyasNTA Abhyas 2022

Solution:

In mammals, including humans, insulin is synthesized as a prohormone, proinsulin. It contains A peptide (21 amino acids), B peptide (30 amino acids) and C peptide (31 amino acids). Disulfide bonds are present between A and B peptides and within A peptide as follows:
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