RNA Later-Crystal!!

[Ed Siefker]

You can find the composition of RNA later at :
http://www.protocol-online.org/biology-forums/posts/8295.html

It's something like 5 molar (NH4)2SO4, so I'd bet that's
what your crystal is.

Note: I haven't tried the recipe for homemade RNALater.  I'd like
to hear from anyone who does though.

Sudheendra Rao N R wrote:
> 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?
> 
> Sudheendra.
>