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In lac-operon, which protein is not regulated by the repressor?
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Tryptophan synthetase
Lac operon consists of three structural gene X, Y, and A. Gene X synthesizes enzyme beta-galactosidase which breaks lactose into glucose and galactose. Gene Y synthesizes enzyme Lactose permease which increases membrane permeability for lactose. Gene A synthesizes enzyme transacetylase which degrades the galactose.
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