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The Wikipedia article on prions and other sources seem to only talk about variants of PrP protein.

I think I remember a previous version of Wikipedia saying something about another protein able to form a prion.

I know there are prion-like proteins, but for this question, I want proteins that are able to form true prions. It does not matter if the protein does not form prions in humans specifically, but does in other organisms.

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  • $\begingroup$ Welcome to Biology.SE. The Biology.SE community has agreed that questions that show little or no prior research effort are off-topic on this site as are "homework" questions unless you have shown your attempt at an answer. Please edit your question and tell us where you've looked for answers, what you do know about the topic, and where exactly you still have questions. Under researched questions may be subject to down-voting and closure. Please take the tour and consult the help center starting with How to Ask for details. $\endgroup$
    – tyersome
    Oct 23 '21 at 19:49
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    $\begingroup$ @tyersome I tried searching, but it just ends up with a bunch of information of PrP, because there does not seem to be much interest in the others or how many there are. $\endgroup$ Oct 23 '21 at 20:42
  • $\begingroup$ No time to write a real answer but for the diversity see ncbi.nlm.nih.gov/pmc/articles/PMC5131755 The 2nd prion thing you might have heard of may have to do with Alzheimer's ucsf.edu/news/2019/05/414326/… I think it's still controversial. $\endgroup$
    – Fizz
    Oct 23 '21 at 23:29
  • $\begingroup$ @Fizz I think it was Doppel protein which I remember, which is called Prion protein 2. It is similar and takes a bigger role in PrP null mice. No idea why researchers didn't try knocking it out too. en.wikipedia.org/wiki/PRND $\endgroup$ Oct 26 '21 at 13:45

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