[Histonet] Block age/labile epitopes

[Andrea T. Hooper]

Just curious as to at what shelf-life people consider their blocks too "old" to rely on for IHC data? Along those lines I am wondering about labile antigens ... does anyone know how fast epitopes may "disappear" from blocks and what are some good examples of labile epitopes/antigens? As usual any references or papers citations would be helpful.

Thank you!
Andrea Hooper