Hi,
    Fix 'em first. Ideally they won't warm up prior to storage, but I like to
err on the side of caution. If they do warm up there will not be as much damage
to the sections if they are already fixed.
Amos Brooks

"Su, Phy-Huynh" wrote:

> Dear Histonetters,
> I would like to ask a question please.  After cryosectioning and air-drying
> the slides, would that be better to fix them before storing them at -80
> degree C, or just store them then fix them just before doing IHC later?
>
> Thank you for the information.