Why would the lac Z gene be fused to the codi | vedclass

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(B) In the production of recombinant insulin,the $DNA$ sequences encoding chain $A$ and chain $B$ of human insulin are fused with the $lac Z$ gene of

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Helps in the selection of recombinants

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(B) In the production of recombinant insulin,the $DNA$ sequences encoding chain $A$ and chain $B$ of human insulin are fused with the $lac Z$ gene of $E. coli$.This fusion protein is produced by the bacteria.The $lac Z$ gene acts as a reporter gene,allowing for the selection of recombinant $E. coli$ colonies through blue-white screening.Recombinant colonies,where the $lac Z$ gene is disrupted by the insertion of the insulin gene,appear white,while non-recombinant colonies appear blue.

Why would the $lac Z$ gene be fused to the coding sequence of chain $A$ and $B$ in plasmids of $E. coli$?

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