Our poly A+ RNA is enriched for mRNA transcripts with two rounds of oligo(dT) cellulose purification. The mRNA is isolated from our total RNA collection, which is meticulously prepared to high quality using our proprietary modified guanidinium thiocyanate method. We offer an extensive selection of human poly A+ RNA from tissues of the tonsil, pituitary gland, prostate gland, thyroid gland, mammary gland, salivary gland, and others.