Microrna (miRNA) is a small, non-coding RNA molecule, typically 20-22 nucleotides long, that plays a crucial role in regulating gene expression at the post-transcriptional level. By binding to complementary sequences in messenger RNA (mRNA), miRNAs can inhibit translation or promote degradation of the target mRNA, effectively silencing specific genes and influencing various biological processes such as development, differentiation, and cell proliferation.
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