Can Cas13 be used to edit DNA or is it only for RNA?
I have tried looking at literature and my understanding is that it can only edit RNA.
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The Cas13 protein targets/edits RNA specifically and not DNA. That said, as you probably know, the Cas9 protein is famously used to edit DNA and was the inspiration that led the Zhang Lab to seek out the Cas13 protein for editing RNA.
If you're interested, you can read here for some additional detail on how Cas13 targets RNA and why it's RNA-specific.