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  1. A heterologous protein for its expression in the milk of a transgenic animal should be under the control of the promoter of the gene coding for
    1. β-Globin
    2. β-Lactoglobulin
    3. Preproinsulin
    4. lac Z
Correct Option: B

β-Lactoglobulin is the major whey protein of cow and sheep’s milk (~3 g/l), and is also present in many other mammalian species; a notable exception being humans. Its structure, properties and biological role have been reviewed many times.



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