Gene Expression

Definition of Gene Expression as it relates to Science, Genetics

Gene expression refers to the process by which genetic information encoded within DNA is used to synthesize functional proteins and RNA molecules, ultimately regulating cellular function and phenotype. This complex and dynamic process involves multiple steps, including transcription of DNA into precursor messenger RNA (pre-mRNA), processing of pre-mRNA into mature mRNA, translation of the mRNA sequence into a polypeptide chain, and post-translational modification of the resulting protein. Gene expression is tightly regulated through various mechanisms, including transcriptional regulation by DNA-binding proteins, epigenetic modifications that alter chromatin structure, and RNA processing events. Dysregulation of gene expression has been implicated in numerous human diseases, making this area of research a critical component of biomedical science.

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