1. 
   microRNA
   (miRNA) (mi″kro-ahr´en-a) any of a number of very small RNA molecules that act as negative regulators of gene expression by binding to specific segments of messenger RNA, thus interfering with translation. MicroRNAs are important in the regulation of a number of cellular processes; and abnorm...
   Found op http://www.encyclo.co.uk/local/21001
   
   
2. 
   microRNA
   (from the article `Life Sciences`) ...not found in the mature sperm of the wild-type mice, was present in the mature sperm of the heterozygous animals, and it suggested that the RNA in ... Research into microRNAs—short strands of RNA that regulate gene expression—made significant progress ...
   Found op http://www.britannica.com/eb/a-z/m/86
   
   
3. 
   MicroRNA
   A microRNA (abbreviated miRNA) is a short ribonucleic acid (RNA) molecule found in eukaryotic cells. A microRNA molecule has very few nucleotides (an average of 22) compared with other RNAs. miRNAs are post-transcriptional regulators that bind to complementary sequences on target messenger RNA tran...
   Found op http://en.wikipedia.org/wiki/MicroRNA
   
   
4. 
   microRNA
   A type of RNA found in cells and in blood. MicroRNAs are smaller than many other types of RNA and can bind to messenger RNAs (mRNAs) to block them from making proteins. MicroRNAs are being studied in the diagnosis and treatment of cancer. Also called miRNA.
   Found op http://www.cancer.gov/dictionary?expand=M
   
   

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