RNA Later-Crystal!!

Rory O'Brien via methods%40net.bio.net (by rory.obrien from stonebow.otago.ac.nz)
Tue Jun 3 23:59:36 EST 2008

I did try making it up according to
http://www.protocol-online.org/biology-forums/posts/8295.html but there was
just no way that amount of Ammonium sulphate would dissolve...

I also came across this

Looks like plain ol' PBS is just as effective ;-)

No, I haven't tried it, yet...

- Rory.

> >> Hi all,
> >> I had kept RNA later at room temperature in an open petri dish by 
> >> mistake and i saw almost colorless longitudinal (not
> smooth but did
> >> not have any defined number of surfaces also) crystals.. 
> of varying
> >> length..not soft but easily breakable what are they? I
> tried heating
> >> the crystal to 50 degrees for 10 min but it did not
> melt..but when i
> >> heated to 100 degrees it melted and evaporatorated.
> >> i guess it must be a molecular crystal!
> >> can u guys shed more light on it?
> >
> >
> >woooooooooooow .... that's some magic :)) I wonder if it's
> just salt or
> >sds or whatever else that may be in the RNA sln..... or
> perhaps you're
> >wondering if the RNA crystalised?
> RNALater is AmmSO4 based isn't it? Ambion patent/patent app. 
> should have exact details.
> Duncan

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