Expression Vectors A brief introduction 

Definition

Expression vectors are the types of vectors that are used to insert gene into host cell that expresses protein (most of the times)  or mRNA transcript.

In case it we are talking about inserting insulin gene into bacterial cell we need expression vectors so that our gene efficiently transferred and then expressed into bacterial cell.

For expression of our protein into the bacterial cell the gene utilizes hosts transcriptional and translational machinery.

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