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RNA markers consist of RNA transcripts from 0.5 to 9 kb, in sizes of 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, and 9 kb. These RNA standards may be denatured with standard procedures, and can be visualized on Northern blots with labeled lambda sequence. Markers are provided at a concentration of 1 mg/ml. Ethidium bromide staining will easily detect 4 µg (4 µL) on a standard agarose gel. Smaller quantities can be detected with GelStar™ Nucleic Acid Gel Stain or SYBR™ Green II Gel Stain.