microRNAs


microRNAs

Small lengths of RNA encoded by their own family of genes located either in non-coding regions of the genome or in the introns of protein-coding genes. MicroRNAs are an integral part of the genetic program and are believed to control gene expression by inhibiting messenger RNAs. Some may act as oncogenes and some may be tumour suppressors. It is thought that the human genome may contain as many as 1000 genes for microRNAs.