Progression of the mammalian cell cycle is regulated in two different ways: 1) phosphorylation and dephosphorylation of key proteins; 2)
synthesis and degradation of regulatory factors. The Proliferating Cell Nuclear Antigen (PCNA) was initially identified as a nuclear antigen in
proliferating cells and was subsequently described as a subunit for DNA polymerase δ. Human PCNA is 262 amino acids with an apparent
molecular weight of 36 kDa. PCNA protein levels peak during the S-phase of the cell cycle, at which time it forms a complex with the p21
inhibitor. PCNA is almost undetectable in other phases of the cycle. Because of its unique expression, PCNA has been extensively used in
studies associating the prognosis of tumor progression and neoplastic proliferation.
原厂资料:
注意事项:
1.Since applications vary, each investigator should titrate the reagent to obtain optimal results.
2.Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.