PCNA (Proliferating Cell Nuclear Antigen), formerly called Cyclin, is a 36kD proliferation associated antigen.

Short term (up to 7 days) store at 2-8 °C. Long term, aliquot and store at <-40 °C. If aliquoted for long term storage, fill volume should be equal to or greater than 50% of the nominal fill volume of the vial used. Avoid repeated freeze/thaw cycles.