Plant RNA Extraction Kit(SpinColumn)
Packing Specification：
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R2114-20
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Plant RNA Extraction Kit(SpinColumn)
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20T
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CNY610
|
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R2114-50
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Plant RNA Extraction Kit(SpinColumn)
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50T
|
CNY1100
|
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R2114-200
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Plant RNA Extraction Kit(SpinColumn)
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200T
|
CNY3960
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For research use only. Not for use in medicine, clinical diagnosis, food, cosmetics or other applications.
Product Introduction:
The unique lysis buffer rapidly lyses cells and inactivates cellular RNases. The plant RNA aid PLANTaid helps bind polysaccharides and polyphenols, which are then removed by centrifugation. After adjusting the binding conditions with ethanol, RNA is selectively adsorbed to the silica matrix membrane in the spin column under high chaotropic salt conditions. Through a series of rapid washing and centrifugation steps, deproteinization buffer and wash buffer remove impurities such as cellular metabolites and proteins. Finally, pure RNA is eluted from the silica matrix membrane with low-salt RNase-free H2O.
Product Features:
1.No toxic reagents such as phenol or chloroform are used, and no ethanol precipitation steps are required.
2.Simple and efficient: Operation for a single sample can generally be completed within 25 minutes.
3.The unique plant RNA aid PLANTaid effectively binds polysaccharides and polyphenols, improving removal efficiency.
4.Extremely wide applicability: Can extract total RNA from more than 100 types of plant samples that fail to be extracted by many domestic and foreign kits, including cotton, pine needles, holly leaves, grape leaves, etc.
5.Multiple column washing steps ensure high purity: The typical OD260/OD280 ratio ranges from 1.9 to 2.2, with almost no DNA residue. Suitable for RT-PCR, Northern blot, and various other experiments.
Experimental Procedures:
Note: Before first use, add the indicated amount of absolute ethanol to the Wash Buffer RW bottle, mix thoroughly, and mark with a check in the box immediately after adding to avoid repeated addition!
1.Direct Grinding Method (Recommended)
a.Weigh 100 mg of fresh plant tissue, cut it into small pieces quickly, and place it into a mortar (frozen or liquid nitrogen-preserved samples can be directly weighed 100 mg and placed into a mortar). Add 10 volumes (1 mL) of RLT and 1 volume (100 μL) of PLANTaid, and grind thoroughly into a homogenate at room temperature. Note: Grind quickly to ensure immediate and full contact between the tissue and Lysis Buffer RLT to inhibit RNase activity. PLANTaid is an indispensable component for extracting difficult samples with high contents of polysaccharides, polyphenols, and secondary metabolite pigments. For extracting common plant tissues, PLANTaid can be omitted, which may slightly increase RNA yield.
b.Transfer the lysate to a centrifuge tube, vortex vigorously for 15 seconds, and centrifuge at 13,000 rpm for 5-10 minutes to pellet undigested debris and PLANTaid bound to polysaccharides and polyphenols.
c.Transfer 480 μL of the lysate supernatant to a new centrifuge tube (more or all supernatant can be taken if it does not exceed the capacity of the RNA spin column to increase yield). Add absolute ethanol equal to 0.5 volumes of the supernatant. Precipitation may occur at this time, but it will not affect the extraction process. Immediately pipette to mix well; do not centrifuge.
d.Proceed directly to Step 3 of the experimental procedures.
2.Liquid Nitrogen Grinding Method (Recommended for extracting complex and easily degradable samples)
a.Transfer 500 μL of Lysis Buffer RLT to a 1.5 mL centrifuge tube, add 50 μL of PLANTaid, and mix well for later use.
b.Grind an appropriate amount of plant tissue into fine powder in liquid nitrogen, transfer 50 mg of the fine powder to the aforementioned centrifuge tube containing RLT and PLANTaid, and vortex vigorously by hand for 20 seconds to fully lyse the sample.
c.Pipette to mix well to assist lysis or vortex vigorously until a satisfactory homogenate is obtained (or homogenize electrically for 30 seconds), which can shear DNA, reduce viscosity, and improve yield.
d.Centrifuge the lysate at 13,000 rpm for 5-10 minutes to pellet undigested debris and PLANTaid bound to polysaccharides and polyphenols.
e.Transfer the lysate supernatant to a new centrifuge tube (more supernatant can be taken if it does not exceed the capacity of the RNA spin column to increase yield). Add absolute ethanol equal to 0.5 volumes of the supernatant. Precipitation may occur at this time, but it will not affect the extraction process. Immediately pipette to mix well; do not centrifuge.
f.Proceed directly to Step 3 of the experimental procedures.
Note: The liquid nitrogen grinding method can be scaled up by doubling the reagents and sample amount if needed to increase yield (i.e., use 1 mL of Lysis Buffer RLT, 100 μL of PLANTaid, and 100 mg of sample).
Experimental Procedures (Continued)
3.Transfer the mixed solution (less than 720 μL each time, can be added in two portions) to a SpinRA column (place the spin column into a collection tube), centrifuge at 13,000 rpm for 2 minutes, and discard the waste liquid. Ensure that all liquid has passed through the membrane after centrifugation with no residue left on the membrane. If necessary, increase the centrifugal force and time.
4.Add 700 μL of Deproteinization Buffer RW1, incubate at room temperature for 1 minute, centrifuge at 13,000 rpm for 30 seconds, and discard the waste liquid.
5.Add 500 μL of Wash Buffer RW (please check if absolute ethanol has been added first!), centrifuge at 13,000 rpm for 30 seconds, and discard the waste liquid. Repeat this step with another 500 μL of Wash Buffer RW.
6.Place the SpinRA column back into the empty collection tube, centrifuge at 13,000 rpm for 2 minutes to remove as much wash buffer as possible, avoiding residual ethanol in the wash buffer that may inhibit downstream reactions.
7.Remove the SpinRA column, place it into a new RNase-free centrifuge tube. According to the expected RNA yield, add 30-50 μL of RNase-free water to the center of the adsorption membrane (heating the water in a 70-90°C water bath in advance can improve yield), incubate at room temperature for 1 minute, and centrifuge at 12,000 rpm for 1 minute.
If the expected RNA yield is >30 μg, add 30-50 μL of RNase-free water and repeat Step 7, then combine the two eluates. Alternatively, add the first eluate back to the spin column and repeat Step 7 for higher RNA concentration. Repeating the elution once results in a high-concentration RNA eluate. Combining two separate eluates increases the RNA yield by 15–30% compared to a single elution, but the concentration is lower. Users can choose according to their needs.
