SAN DIEGO--(BUSINESS WIRE)--Illumina, Inc. (NASDAQ:ILMN) today launched a MicroRNA Assay for Gene Expression profiling. Priced at $95 per sample, this assay is the only solution available to allow rapid and reproducible miRNA expression profiling at a price less than half that of other commercially available methods. By developing a high-density expression array with content from the miRBase Sequence Database this new tool will help researchers better understand the role microRNAs (miRNA) play in regulating messenger RNA (mRNA).