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Genetically engineered bacteria have been successfully used in the commercial production of
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- human insulin
- testosterone
- thyroxine
- melatonin
Correct Option: A
Human insulin has 53 amino acids in two polypeptides (A and B) connected by two S-S (disulphide) linkages. In 1983, American company Eli Lilly prepared two DNA sequences corresponding to A and B insulin chains. When introduced in plamids of E.coli, insulin chains were formed. They were extracted and fused to produce humulin (human insulin).
