Detection of Human p21/CIP1/CDKN1A by Western Blot.
Western blot shows lysates of MCF‑7 human breast cancer cell line untreated (-) or treated (+) with 1 μM camptothecin (CPT) for 16 hours. PVDF membrane was probed with 2 µg/mL of Mouse Anti-Human p21/CIP1/CDKN1A Monoclonal Antibody (Catalog # MAB1047), followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). A specific band was detected for p21/CIP1/CDKN1A at approximately 21 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
p21/CIP1/CDKN1A in Human Breast Cancer Tissue.
p21/CIP1/CDKN1A was detected in immersion fixed paraffin-embedded sections of human breast cancer tissue using Mouse Anti-Human p21/ CIP1/CDKN1A Monoclonal Antibody (Catalog # MAB1047) at 15 µg/mL overnight at 4 °C. Before incubation with the primary antibody tissue was subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013). Tissue was stained using the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.
Detection of p21/Cip1/CDKN1A in MCF‑7 Human Cell Line by Flow Cytometry.
MCF‑7 human breast cancer cell line either treated with 1 μM camptothecin (CPT) for 16 hours (filled histogram) or untreated (open histogram) was stained with Mouse Anti-Human p21/CIP1/CDKN1A Monoclonal Antibody (Catalog # MAB1047), followed by Phycoerythrin-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # F0102B). To facilitate intracellular staining, cells were fixed with Flow Cytometry Fixation Buffer (Catalog # FC004) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # FC005). View our protocol for Staining Intracellular Molecules.
Preparation and Storage
The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C, as supplied.
1 month, 2 to 8 °C under sterile conditions after opening.
6 months, -20 to -70 °C under sterile conditions after opening.
p21CIP1, also called CIP1 (CDK-interacting protein 1) and CDKN1A, is a 21 kDa Cyclin/Cyclin-dependent kinase (Cdk) inhibitor that blocks cell cycle progression from G1 to S phase in the cell cycle. Because p21 is a transcriptional target of the p53 tumor suppressor, p21 expression increases in cells that contain stabilized p53 due to genotoxic stress exposure.
p21 Cyclin Dependent Kinase 4 Inhibitor 1A
Entrez Gene IDs:
1026 (Human); 12575 (Mouse); 114851 (Rat)
CAP20cyclin-dependent kinase inhibitor 1; CDK-interacting protein 1; CDKN1A; CDKN1melanoma differentiation associated protein 6; CIP1; CIP1WAF1CDK-interaction protein 1; cyclin-dependent kinase inhibitor 1A (p21, Cip1); MDA6; MDA-6; Melanoma differentiation-associated protein 6; p21; p21CIP1; p21Cip1/Waf1; PIC1; SDI1DNA synthesis inhibitor; wild-type p53-activated fragment 1
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