50% Glycerol, 0.05% BSA and 0.05% preservative in PBS (pH 7.2-7.4)
Purification
Protein A affinity purification
Concentration
0.2 mg/ml
Storage
Stored at -20°C for 1 year. Avoid repeated freeze / thaw cycles.
Shipping
Frozen
Form
Liquid
Calculated MW
18 kDa
Observed MW
18 kDa
Clonality
Monoclonal
Clone No.
82F87
Isotype
IgG, Kappa
抗原与靶点信息
Antigen & Target Information
Gene Name
CDKN1A
Protein Name
Cyclin-dependent kinase inhibitor-1A
Background
p21 (CDKN1A, cyclin-dependent kinase inhibitor 1A) is a broad-spectrum CDK-inhibitor family protein mediating cell-cycle repression, DNA-damage response and senescence control. p21 inhibits multiple Cyclin-CDK assemblies, prevents Rb phosphorylation and arrests cells at G1 and G2 phases to repress DNA replication. As major transcriptional target downstream of p53, p21 is strongly induced upon genotoxic stress to enforce cell-cycle checkpoint. p21 also interacts with PCNA to directly suppress DNA polymerase activity. Beyond tumor-suppression, p21 modulates cell differentiation and stem-cell homeostasis, and exhibits context-dependent dual roles in cancers.