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Genetic engineering, also known as recombinant DNA technology, is the deliberate manipulation of an organism's genome using biotechnological tools to alter its genetic material for specific purposes. It involves the introduction, deletion, or modification of genes within an organism to achieve desired traits that would not naturally occur through conventional breeding or natural evolution. In the context of drugs regulatory affairs, genetic engineering plays a pivotal role in the development, production, and regulation of pharmaceuticals, vaccines, and therapeutic proteins. The technique enables the production of biologics with enhanced efficacy, reduced side effects, and targeted therapeutic action, which requires meticulous regulatory oversight to ensure safety, efficacy, and ethical compliance. The fundamental process of genetic engineering typically involves several key steps. Initially, the gene of interest, which encodes a desired protein or function, is identified and isolated using molecular biology techniques such as restriction enzymes and polymerase chain reaction (PCR). This gene is then inserted into a vector, often a plasmid or viral genome, which can carry the gene into a host organism. Microorganisms, including bacteria, yeast, and filamentous fungi, are commonly used as host systems because of their rapid growth, well-characterized genetics, and ability to express foreign genes efficiently. Once the gene is introduced into the host, the microorganism expresses the protein or produces the compound encoded by ________ _______ ______ _________ _________ _____ ___ _______ __________ ____ ___ ____.
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