Re: Radio opaque biomolecule?

As pointed out by Jelmer, there probably isn't much in the "radio" area
of the spectrum, but if you meant more generally "Are there any
molecules that block useful scanning frequencies", then yes, there are.
I believe (i.e. am not certain) that melanin can block X-rays to some
extent, so a tight clot of melanin might be slightly X-ray opaque.
Calcified matter is X-ray opaque, as is fibrosis, so it's probable that
any knot of tightly woven protein would be somewhat opaque also.

That's all structural stuff, of course. But structure's where it's at;
for some frequencies, you'll need larger obstructions to absorb the
light effectively. For radio, you'd need conductive bones or something;
ask a radio tech for the specifics on absorption of radio and translate
that into a biotech context. It wouldn't be easy, certainly.

On 02/01/12 06:40, Veera wrote:
> Recently i had some ideas about radioimaging gene expression. There
> are many ways to study gene expression like using flourescent protien
> tags. but all those requires sacrificing the animal for taking tissue
> sections for immuno histochemistry. so i was searching some concepts
> for visualizing gene expression within specific tissues inside the
> body by some imaging techniques.Incidentally i came across bio
> activated contrast agents.You can see that in this link <link>http://
> www.nibib.nih.gov/HealthEdu/eAdvances/23Oct06<link>. But instead of
> using contrast agent i'm just curious to know is there anything like
> any protien or any biomolecule which is naturally radio opaque whose
> gene can be sandwiched with the promoter of the gene of interest and
> so we can image the the tissue and study the gene expression without
> killing the animal.....
>

--
www.indiebiotech.com
twitter.com/onetruecathal
joindiaspora.com/u/cathalgarvey
PGP Public Key: http://bit.ly/CathalGKey

--
You received this message because you are subscribed to the Google Groups "DIYbio" group.
To post to this group, send email to diybio@googlegroups.com.
To unsubscribe from this group, send email to diybio+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/diybio?hl=en.