Worms at Chernobyl resistant to mutation.

Discussion in 'Biology & Genetics' started by Pinball1970, Mar 9, 2024.

  1. Write4U Valued Senior Member

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    • Please post on topic.
    Hoping this is not viewed as a sidetrack, but as another piece of the puzzle. I see a possible connection between microtubules and "insulation"(?) from radiation? This is outside my scope of knowledge, so if anyone can offer a comment or link to a pertinent paper,
    I think it might be interesting in context of radiation resistance during mitosis

    Are microtubules electron-based topological insulators?
    Varsha Subramanyan1, Kay L. Kirkpatrick2,1, Saraswathi Vishveshwara3 and Smitha Vishveshwara1
    Published 15 August 2023 • Copyright © 2023 The author(s)
    more..... https://iopscience.iop.org/article/10.1209/0295-5075/acec94
     
    Last edited: Mar 27, 2024
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  3. exchemist Valued Senior Member

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    Reported for thread hijacking.
     
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  5. James R Just this guy, you know? Staff Member

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    Moderator note: Write4U has been warned for off-topic posting.

    Due to accumulated warning points, Write4U will be taking another break from sciforums.
     
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  7. Pinball1970 Valued Senior Member

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    One step forward which I acknowledged, then MT and a ban.

    I am hoping you take what you need to from this.
     
  8. Pinball1970 Valued Senior Member

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    I had trouble posting to the article so I have contacted the site. I have an account there now so should be no issue as far as I am concerned.

    Thanks for reporting the side track. I was actually engaging in what I thought was the first proper interaction with him then the next post was MT. I was actually disappointed, thought I had got somewhere.
     
  9. exchemist Valued Senior Member

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    I really do think we have to stop Write4U corrupting otherwise intelligent and informative threads with his obsessions. He has wrecked countless discussions in the past by introducing red herrings and I for one have really had enough of it. Ideally I would have preferred it if his post had been excised from the thread and dumped, but I'm not a mod.

    Back to the topic, here's an absorption spectrum I found for melanin:

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    The visible spectrum extends to the right from about 380nm, so everything to the left is UV absorption.


    Melanin seems to comprise a wide range of poorly characterised polymers of 5,6-dihydroxyindole and related species:

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    I gather melanin precursors are formed from tyrosine:


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    The red squiggly lines indicate linkages to form polymer chains. One can see that these heterocyclic aromatic units, with or without further conjugation via polymer chains, are likely to have π* orbitals that can be populated by UV absorption.

    As for a role as radical scavengers, I think I recall phenolic and quinone type molecules are good at stabilising free radicals, as they can give up H• from the hydroxyl group to react with a radical and then delocalise the remaining odd electron round the aromatic rings, i.e. in a π* orbital. What I don't believe is that molecules of this type can have any special role in absorbing nuclear (α, β or γ) radiation directly, since that will be a function of the atomic nuclei present, which are just C, N, O, H as found in all other organic molecules.
     
    Last edited: Mar 29, 2024
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  10. Pinball1970 Valued Senior Member

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    Yes please. Not just because it is my thread and something I am interested in, but because this is an interesting subject that can teach us a lot about, mutation, genetics, and evolution.
     
  11. Pinball1970 Valued Senior Member

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    1,047
    Ok, a little bit of reading/catch up is required from my side.

    Thanks for contributing. I will feedback if the org gets back.
     

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