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Alternative protocol for evaluating RNA integrity, using a bleach gel
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Ludwig Nijholt
Alternative protocol for evaluating RNA integrity, using a bleach gel
I don't think bleach can denature RNA. Bleach is an oxidizing agent and it will damage the RNA. Also, the protocol mentions addition of hypochlorite before heating which I think is illogical because heat will decompose it.
For testing RNA integrity you need not make a denaturing gel. What you can instead do is to heat the RNA with the 2xRNA loading buffer that contains 95% formamide and run it in a normal TBE/TAE agarose gel. Heating with formamide denatures the RNA permanently.
Denaturing gels are only essential for Northern Blots.
You can also run your sample in a bioanalyzer to check for RNA integrity and this is always recommended for RNAseq experiments (even for microarrays but I cannot comment much on that because I have never done it and am not aware of the usual practice).
I don't think bleach can denature RNA. Bleach is an oxidizing agent and it will damage the RNA. Also, the protocol mentions addition of hypochlorite before heating which I think is illogical because heat will decompose it.
For testing RNA integrity you need not make a denaturing gel. What you can instead do is to heat the RNA with the 2xRNA loading buffer that contains 95% formamide and run it in a normal TBE/TAE agarose gel. Heating with formamide denatures the RNA permanently.
Denaturing gels are only essential for Northern Blots.
You can also run your sample in a bioanalyzer to check for RNA integrity and this is always recommended for RNAseq experiments (even for microarrays but I cannot comment much on that because I have never done it and am not aware of the usual practice).
I'm telling you I didn't believe it either but it works quite well. Don't add it to the agarose before microwaving and use 6%. Also the rna will be denatured already from most any purification procedure especially the standard ones that use guanidine. works good for a teaching lab (cheap and easier) and I think this protocol focus's on RNAse removal or inactivation. +1 for the heating recc but I'm weary to heat rna unless it can be flash heated. I may Ty this next time however.More
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The bleach is not to denature the RNA but to destroy and RNase that might be lurking in your agarose or buffer - heat doesn't kill RNase easily so the boiling doesn't help. Then just run a normal agarose gel (TAE/TBE or borate) and look at the relative intensities of the LSU and SSU RNA. The bleach gels work very well for me and I've got very good RNA-Seq results out of RNA analysed this way (I don't have access to a bioanalyser).
The bleach is not to denature the RNA but to destroy and RNase that might be lurking in your agarose or buffer - heat doesn't kill RNase easily so the boiling doesn't help. Then just run a normal agarose gel (TAE/TBE or borate) and look at the relative intensities of the LSU and SSU RNA. The bleach gels work very well for me and I've got very good RNA-Seq results out of RNA analysed this way (I don't have access to a bioanalyser).
I don't think bleach can denature RNA. Bleach is an oxidizing agent and it will damage the RNA. Also, the protocol mentions addition of hypochlorite before heating which I think is illogical because heat will decompose it.
For testing RNA integrity you need not make a denaturing gel. What you can instead do is to heat the RNA with the 2xRNA loading buffer that contains 95% formamide and run it in a normal TBE/TAE agarose gel. Heating with formamide denatures the RNA permanently.
Denaturing gels are only essential for Northern Blots.
You can also run your sample in a bioanalyzer to check for RNA integrity and this is always recommended for RNAseq experiments (even for microarrays but I cannot comment much on that because I have never done it and am not aware of the usual practice).
I don't think bleach can denature RNA. Bleach is an oxidizing agent and it will damage the RNA. Also, the protocol mentions addition of hypochlorite before heating which I think is illogical because heat will decompose it.
For testing RNA integrity you need not make a denaturing gel. What you can instead do is to heat the RNA with the 2xRNA loading buffer that contains 95% formamide and run it in a normal TBE/TAE agarose gel. Heating with formamide denatures the RNA permanently.
Denaturing gels are only essential for Northern Blots.
You can also run your sample in a bioanalyzer to check for RNA integrity and this is always recommended for RNAseq experiments (even for microarrays but I cannot comment much on that because I have never done it and am not aware of the usual practice).
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The bleach is not to denature the RNA but to destroy and RNase that might be lurking in your agarose or buffer - heat doesn't kill RNase easily so the boiling doesn't help. Then just run a normal agarose gel (TAE/TBE or borate) and look at the relative intensities of the LSU and SSU RNA. The bleach gels work very well for me and I've got very good RNA-Seq results out of RNA analysed this way (I don't have access to a bioanalyser).
The bleach is not to denature the RNA but to destroy and RNase that might be lurking in your agarose or buffer - heat doesn't kill RNase easily so the boiling doesn't help. Then just run a normal agarose gel (TAE/TBE or borate) and look at the relative intensities of the LSU and SSU RNA. The bleach gels work very well for me and I've got very good RNA-Seq results out of RNA analysed this way (I don't have access to a bioanalyser).
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