Total RNAs are available from almost 200 different human adult and fetal normal tissues, human diseased and tumor tissues, as well as mouse, rat, and monkey tissues. Total RNAs are provided ready-to-use for Northern blotting, cDNA synthesis, RNA protection, and RNA differential display. United States Biological offers a comprehensive catalogue of total RNAs from human, mouse, rat, and monkey tissues for your research needs. We help you maximize your valuable research time, by enabling immediate study of genes of interest in many different tissues. , Total RNA isolation is performed using proprietary techniques. Contamination by RNase, genomic DNA polysaccharides, and proteoglycans has been effectively eliminated. The integrity of the total RNAs is assured by checking for a ratio of greater than 1/1 between 28S and 18S ribosomal RNA. We guarantee high efficiency reverse transcription. Features: Total RNA isolated from a wide variety of hard to obtain tissues , Decontamination of polysaccharide, proteoglycan, RNase, and genomic DNA , Extensive quality control procedures to ensure high quality , High efficiency reverse transcription , Available documentation of tissues" clinical histories (additional cost), Applications: Northern Blot, RT-PCR, RACE, , cDNA synthesis, cDNA library construction, cDNA probe for profiling study in gene expression, RNA protection and primer extension, RNA display, Purification of mRNA. Other applications not tested. Quality Control: 1. The integrity of the RNA is examined by visual inspection for the presence of intact bands of 18s and 28s ribosomal RNA when electrophoreses on a denaturing agarose gel. The quality and puiryt of total RNA were tested by spectrophotometer. A260/A280 is 1.8-2.0 (detected in 10mM Tris-Cl, pH 7.5)., 2. The RNA is treated by DNase I. It is tested as DNA free RNA by PCR. Storage and Stability: Aliquot to avoid repeated freezing and thawing and store at -70°C. Aliquots are stable for 6 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.