Anti-Ki67 antibody [MKI67/2465] (ab238020) is a mouse monoclonal antibody detecting Ki67 in Flow Cytometry, IHC-P. Suitable for Human.
- Over 10 publications
pH: 7.2 - 7.4
Preservative: 0.05% Sodium azide
Constituents: PBS, 0.05% BSA
ICC | Flow Cyt | Protein Array | IHC-P | |
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Human | Tested | Tested | Expected | Tested |
Recombinant full length protein - Human | Not recommended | Not recommended | Tested | Not recommended |
Species | Dilution info | Notes |
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Species Human | Dilution info 1-2 µg/mL | Notes - |
Species | Dilution info | Notes |
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Species Recombinant full length protein - Human | Dilution info - | Notes - |
Species | Dilution info | Notes |
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Species Human | Dilution info - | Notes 1-2 μg/million cells |
Species | Dilution info | Notes |
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Species Recombinant full length protein - Human | Dilution info - | Notes - |
Species | Dilution info | Notes |
---|---|---|
Species Recombinant full length protein - Human | Dilution info - | Notes - |
Species | Dilution info | Notes |
---|---|---|
Species Human | Dilution info Use at an assay dependent concentration. | Notes - |
Species | Dilution info | Notes |
---|---|---|
Species Human | Dilution info 1-2 µg/mL | Notes Primary incubation for 30 minutes at room temperature. |
Species | Dilution info | Notes |
---|---|---|
Species Recombinant full length protein - Human | Dilution info - | Notes - |
The protein expressed by the MKI67 gene is required to maintain individual mitotic chromosomes dispersed in the cytoplasm following nuclear envelope disassembly and associates with the surface of the mitotic chromosome, specifically the perichromosomal layer, covering a significant portion of the chromosome surface (PubMed:27362226). It prevents chromosomes from collapsing into a single chromatin mass by creating a steric and electrostatic charge barrier due to its high net electrical charge, acting as a surfactant that disperses chromosomes and enables their independent motility (PubMed:27362226). The protein binds DNA, with a preference for supercoiled and AT-rich DNA (PubMed:10878551), and may play a role in chromatin organization, though it is unclear if it directly influences chromatin organization or if this is an indirect result of its function in maintaining dispersed mitotic chromosomes (Probable, PubMed:24867636). This supplementary information is collated from multiple sources and compiled automatically.
Proliferation marker protein Ki-67, Antigen identified by monoclonal antibody Ki-67, Antigen KI-67, Antigen Ki67, MKI67
Anti-Ki67 antibody [MKI67/2465] (ab238020) is a mouse monoclonal antibody detecting Ki67 in Flow Cytometry, IHC-P. Suitable for Human.
- Over 10 publications
pH: 7.2 - 7.4
Preservative: 0.05% Sodium azide
Constituents: PBS, 0.05% BSA
Purified from Bioreactor concentrate.
Ki67 is a nuclear protein often referred to as MKI67 with a molecular weight of approximately 345 kDa. This protein is strongly associated with cell proliferation. Scientists commonly use Ki67 staining techniques to identify and quantify proliferating cells in tissues. Ki67 is expressed in the nucleus during active cell cycle phases—G1 S G2 and M—but not in resting cells in G0 phase. It is detectable through methods such as Ki67 immunofluorescence and Ki67 flow cytometry which are important for analyzing cell division.
The Ki67 protein plays an essential role in cellular proliferation processes. It does not form part of a stable complex but interacts transiently with other cell cycle-related proteins. Research indicates that Ki67 maintains the structure of the perichromosomal layer during mitosis impacting chromosome separation. It is particularly active in tissues with high cell turnover such as bone marrow and lymphoid organs.
Ki67 influences several key cellular pathways that control cell proliferation and differentiation. The protein acts within the regulation of the cell cycle and the PI3K/AKT signaling pathway important for cell growth and survival. Within these pathways Ki67 interacts with proteins like cyclin-dependent kinases (CDKs) which regulate transitions between different phases of the cell cycle.
Ki67 has significant implications in oncology and can be used as a biomarker for cancer prognosis. Its expression levels help determine the aggressiveness of tumors especially in breast cancer and prostate cancer. High Ki67 levels correlate with poor prognosis as it indicates rapid cell division. In cancer Ki67 associates with p53 a protein that regulates the cell cycle and function as a tumor suppressor.
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Formalin-fixed, paraffin-embedded human tonsil tissue stained for Ki67 using ab238020 at 2 μg/ml in immunohistochemical analysis.
Flow cytometric analysis of HeLa (human epithelial cell line from cervix adenocarcinoma) cells labeling Ki67 with ab238020 at 2 μg per 106 cells (blue) compared to an isotype control (red). A Goat Anti-mouse CF488 secondary antibody was used.
MCF7 (human breast adenocarcinoma cell line) cells stained for Ki67 (green) using ab238020 at 2 μg/mL in ICC. The membrane is labelled with phalloidin (red).
ab238020 was tested in protein array against over 19000 different full-length human proteins.
Z- and S- Score: The Z-score represents the strength of a signal that a monoclonal antibody (MAb) (in combination with a fluorescently-tagged anti-IgG secondary antibody) produces when binding to a particular protein on the HuProtTM array. Z-scores are described in units of standard deviations (SD's) above the mean value of all signals generated on that array. If targets on HuProtTM are arranged in descending order of the Z-score, the S-score is the difference (also in units of SD's) between the Z-score. S-score therefore represents the relative target specificity of a MAb to its intended target.
A MAb is specific to its intended target if the MAb has an S-score of at least 2.5. For example, if a MAb binds to protein X with a Z-score of 43 and to protein Y with a Z-score of 14, then the S-score for the binding of that MAb to protein X is equal to 29.
Immunocytochemistry analysis of formaldehyde-fixed human hiSPC cells, staining with ab238020 at 1/100 dilution. Secondary antibody was Alexa Fluor® 647 goat anti mouse 1/1000 dilution. Cells were incubated with the primary antibody with 1% BSA 0.3% Triton X for 12 hours at 4°C . Blocking was done using 3% BSA for 1 hour.
Immunocytochemistry analysis of paraformaldehyde-fixed human hES cells differentiated into neural crest cells permeabilized with 0.5% Triton, staining with ab238020 at 1/100 dilution. Secondary antibody was Alexa Fluor™ 647 Goat anti Mouse at 1/500 dilution. Cells were incubated with the primary antibody with 10% serum in PBS for 18 hours at 4°C . Blocking was done using 10% serum for 2 hours at room 25°C.
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