DynaMarker, Small RNA II

Product#: DM192
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DynaMarker, Small RNA II

Cat. No. DM192
Size 30 loadings, 30 μl ( approximately 6-8 μg) 
Storage condition Store at -80 o C. Repeated freeze/thaw cycles should be avoided.
Range 20-100 base of RNA
Storage buffer 10 mM Tris-HCl (pH 8.0) buffer containing 1 mM EDTA (Ammonium acetate is slightly contained)
Storage condition Store at -80 o C. Repeated freeze/thaw cycles should be avoided.


Small RNAs include a variety of non-coding RNAs, such as miRNA, siRNA, snoRNA and snRNA. Recently such a small RNA is intensively studied, because the small RNA has been found to control many biological events. The DynaMarker Small RNAⅡ consists of five single-stranded RNAs (ssRNA). The 20, 30, 40 and 50 bases RNAs are synthesized by chemically (non phosphorylated). The 100 bases RNA is synthesized by in vitro transcription. The DynaMarker Small RNA Ⅱ is suitable for determinating size of small-size ssRNA in denaturing polyacrylamide gel electrophoresis. The DynaMarker Small RNAⅡ can be visualized by ethidium bromide staining or by staining with Gel IndicatorTM RNA Staining Solution (DM590, 595).

DynaMarker Small RNA II consists of five single-stranded RNAs (ssRNA), 20, 30, 40, 50 and 100 bases RNAs. This single-stranded RNA (ssRNA) molecular weight marker is sutaible for determing the size of small RNA on denaturing-polyacrylamide gel electrophoresis. Useful for analysis of siRNA and miRNA. 


DynaMarker® Small RNA II


Electrophoresis profile of DynaMarker® Small RNA II (1μl) on 12.5% of acrylamide, 7.5 M urea gel with 1×TBE buffer as running buffer

The DynaMarker® Small RNA II is single-stranded RNA (ssRNA) molecular weight marker.
Suitable for determining size of small RNA on denaturing-polyacrylamide gel electrophoresis.

  • Consists of five ssRNAs (20, 30, 40, 50 and 100 bases)
  • Useful for analysis of siRNA and miRNA
  • Each band was high purified to give high resolution on denaturing-polyacrylamide gel electrophoresis
Quality Control
After 18 hrs incubation of the DynaMarker Small RNAⅡ at 37 oC, no visible degradation of the marker is observed in 12.5 % polyacrylamide / 7.5 M urea gel electrophoresis
  • The DynaMarker Small RNA II is not prepared for estimating of RNA amount.
  • The DynaMarker Small RNAⅡshould be run on 10-20% denaturing polyaceylamide gel for sizing RNAs.
  • RNA is very sensitive to degradation by nucleases. To avoid damaging the DynaMarker Small RNAⅡ, use extreme care during manipulations to prevent nuclease contamination. Wear gloves and use clean apparatus. Glassware should be pretreated with diethyl pyrocarbonate (DEPC). Nuclease-free disposable plasticware should be used. Solutions and reagents to mix the marker should be high grade and nuclease-free. To use, thaw the DynaMarker Small RNAⅡ on ice and keep it on ice while using.
Recommended usage
  • The DynaMarker Small RNAⅡis manufactured for 10-20% denaturing polyacrylamide gel electrophoresis. As recommended usage, DynaMarker Small RNAⅡcan be run on 12.5 % polyacrylsmide / 7.5 M urea gel as below.
  • Procedure 
1. Preparation of 40 % Acrylamide : bis solution
Acrylamide : bis 190 g
N, N-methylenebisacrylamide 10 g
ddH2O to 500 ml 

After mixing, filter the solution through a nitrocellulose filter (0.45 ?m pore size)

2. Preparation of 12.5 % polyacrylamide / 7.5 M urea gel (20 ml gel)

40 % acrylamide : bis solution 6.25 ml
Urea 9.0 g
10 × TBE 2.0 ml
H2O to 20 ml 

After urea is dissolved completely, add 20 μl of TEMED and 160 μl of 10 % ammonium persulfate. Mix quickly and then pour the gel into the mold of a vertical gel apparatus (8.7 cm × 6.8 cm, thickness 1 mm). The gel apparatus should be assembled according to the manufacture’s protocol and ready to run with 1 × TBE buffer.

3. Loading and electrophoresis Mix 5 μl of gel loading buffer* with 1 μl** of DynaMarker Small RNAⅡor a few μg of RNA sample in a small tube. Heat at 80 ℃ for 5 min and immediately transfer the tube on ice. Load the mixture onto a well of 12.5 % polyacrylamide / 7.5 M urea gel and start electrophoresis. After the tracking dyes have migrated an appropriate distance through gel, stop the electrophoresis. To stain with ethidium bromide, disassemble the apparatus and transfer the polyacrylamide gel to a gel tray filled with 1 × TBE buffer containing 1.0 μg/ml ethidium bromide. Stained RNA can be visualized using UV transilluminator.

gel loading buffer*
80 %      deionized formamide
0.025%     (w/v) bromophenol blue
0.025%     (w/v) xylene cyanol FF
10 mM      EDTA (pH8.0) 
** The amount is enough to be visualized by ethidium bromide staining.
  • Sambrook, J. and Russell, D.W. (2001) Molecular Cloning: A Laboratory Manual, 3rd ed., Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY.

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