Dear Cecilia,
By PTB, do you mean N-phenacylthiazolium bromide
<http://en.wikipedia.org/w/index.php?title=N-phenacyl_thiazolium_bromide&action=edit&redlink=1>?
A google search appears to throw up a company called "Chemos Group",
however our requisitioning database has no results for this product
either. It has been used in a number of published experiments
investigating diabetes amongst other things, so perhaps if you can track
down these papers they will include their sources for the chemicals.
I hope this is a little bit helpful, I am sorry I can't think of any
alternative suggestions!
Good luck,
Kind regards
Susannah Baldry
Cecilia Sosa wrote:
> Dear all,
>
> I am having trouble extracting DNA from some 1000yr bone samples that have
> been treated (20 yrs ago) with Paraloid B72 (ethy methacrylate co-polymer,
> also known as Acryloid B72).
>
> Does anyone have any experience with this?
>
> In the last Conference on Ancient DNA and Assoc. Biomolecules, Helen
> Donoghue suggested that I tried PTB, which would disrupt any cross-link, in
> the case that was the problem. I think it is worth trying it, but cannot find this
> product.
>
> Does anyone know where this 'strange chemical' can be purchased?
>
> And does anyone have other suggestions/ideas?
>
> Thank you very much,
>
> Cecilia Sosa
>
>
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