Ambion® FirstChoice® Human Brain Reference RNA is a high-quality standard for human microarray analysis, pooled from multiple donors and several brain regions, thus ensuring unbiased coverage. It is supplied in one tube containing 50 µg. The Reference RNA passes the stringent QC criteria for purity and integrity that distinguishes all of FirstChoice® RNA offerings and is the same RNA (identical manufacturing lot) used for the MicroArray Quality Control (MAQC) project. For more information about the MAQC project, please visit The National Center for Toxicological Research.