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AB21700

Anti-Ki67 antibody [SP6], prediluted

5

(3 Reviews)

|

(42 Publications)

Rabbit Recombinant Monoclonal Ki67 antibody. Suitable for ICC/IF, WB, IHC-P, Flow Cyt (Intra) and reacts with Human, Mouse samples. Cited in 42 publications.

View Alternative Names

Proliferation marker protein Ki-67, Antigen identified by monoclonal antibody Ki-67, Antigen KI-67, Antigen Ki67, MKI67

8 Images
Flow Cytometry (Intracellular) - Anti-Ki67 antibody [SP6], prediluted (AB21700)
  • Flow Cyt (Intra)

Unknown

Flow Cytometry (Intracellular) - Anti-Ki67 antibody [SP6], prediluted (AB21700)

Intracellular flow cytometric analysis of 4% paraformaldehyde fixed 90% methanol permeabilized parental HAP1 (Wildtype controlHuman chronic myelogenous leukemianear-haploid cell line) cells labelling Ki67 with ab16667 at 1/500 dilution (0.1ug) (Red) compared with a Rabbit monoclonal IgG (ab172730)(Black) isotype control and an unlabelled control (cells without incubation with primary antibody and secondary antibody) (Blue). A Goat anti rabbit IgG (Alexa Fluor® 488 ab150077) at 1/2000 dilution was used as the secondary antibody.

This data was developed using ab16667, the same antibody clone in a different buffer formulation.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Ki67 antibody [SP6], prediluted (AB21700)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Ki67 antibody [SP6], prediluted (AB21700)

Immunohistochemical analysis of formalin-fixed, paraffin-embedded Human thymus tissue, staining Ki67 with ab21700.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Ki67 antibody [SP6], prediluted (AB21700)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Ki67 antibody [SP6], prediluted (AB21700)

Immunohistochemical analysis of formalin-fixed, paraffin-embedded Human breast adenocarcinoma tissue, staining Ki67 with ab21700.

Immunocytochemistry/ Immunofluorescence - Anti-Ki67 antibody [SP6], prediluted (AB21700)
  • ICC/IF

Unknown

Immunocytochemistry/ Immunofluorescence - Anti-Ki67 antibody [SP6], prediluted (AB21700)

This data was developed using ab16667, the same antibody clone in a different buffer formulation.
Immunofluorescent analysis of 100% methanol-fixed None permeabilized HeLa cells labelling Ki67 with ab16667 at 1/1000 dilution followed by ab150077 Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) antibody at 1/1000 dilution (2 µg/mL) (Green). Confocal image showing nucleolar staining in HeLa cell line ab195889 Anti-alpha Tubulin mouse monoclonal antibody - Microtubule Marker (Alexa Fluor® 594) was used to counterstain tubulin at 1/200 dilution (2.5 µg/mL) (Red). The Nuclear counterstain was DAPI (Blue).Secondary antibody only control : Secondary antibody is ab150077 Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) at 1000 dilution (2 µg/mL).

Immunocytochemistry/ Immunofluorescence - Anti-Ki67 antibody [SP6], prediluted (AB21700)
  • ICC/IF

Unknown

Immunocytochemistry/ Immunofluorescence - Anti-Ki67 antibody [SP6], prediluted (AB21700)

This data was developed using ab16667, the same antibody clone in a different buffer formulation.Immunofluorescent analysis of 100% methanol-fixed, None permeabilized parental HAP1 cells labelling Ki67 with ab16667 at 1/1000 dilution, followed by ab150077 Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) antibody at 1/1000 dilution (2 µg/mL) (Green). Confocal image showing nucleolar staining in parental HAP1cell line ab195889 Anti-alpha Tubulin mouse monoclonal antibody - Microtubule Marker (Alexa Fluor® 594) was used to counterstain tubulin at 1/200 dilution (2.5 µg/mL) (Red). The Nuclear counterstain was DAPI (Blue).

Secondary antibody only control : Secondary antibody is ab150077 Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) at 1000 dilution (2 µg/mL).

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Ki67 antibody [SP6], prediluted (AB21700)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Ki67 antibody [SP6], prediluted (AB21700)

Immunohistochemical analysis of formalin-fixed, paraffin-embedded Human tonsil tissue, staining Ki67 with ab21700.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Ki67 antibody [SP6], prediluted (AB21700)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Ki67 antibody [SP6], prediluted (AB21700)

Immunohistochemical analysis of formalin-fixed, paraffin-embedded Human endometrial adenocarcinoma tissue, staining Ki67 with ab21700.

Western blot - Anti-Ki67 antibody [SP6], prediluted (AB21700)
  • WB

Lab

Western blot - Anti-Ki67 antibody [SP6], prediluted (AB21700)

This data was developed using the same antibody clone in a different buffer formulation (ab16667).

Lanes 1 - 3 : Merged signal (red and green). Green - ab16667 observed at 359 kDa. Red - loading control, ab130007 observed at 125 kDa.

ab16667 was shown to react with Ki67 in wild-type HeLa cells. Loss of signal was observed when knockout cell line ab255407 (knockout cell lysate ab263762) was used. Wild-type and Ki67 knockout samples were subjected to SDS-PAGE. ab16667 and Anti-Vinculin antibody [VIN-54] (ab130007) were incubated overnight at 4°C at 1 in 100 dilution and 1 in 20000 dilution respectively. Blots were developed with Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed (ab216773) and Goat anti-Mouse IgG H&L (IRDye® 680RD) preadsorbed (ab216776) secondary antibodies at 1 in 20000 dilution for 1 hour at room temperature before imaging.

All lanes:

Western blot - Anti-Ki67 antibody [SP6] (<a href='/en-us/products/primary-antibodies/ki67-antibody-sp6-ab16667'>ab16667</a>) at 1/100 dilution

Lane 1:

Ramos cell lysate at 20 µg

Lane 2:

Wild-type HeLa cell lysate at 20 µg

Lane 3:

Western blot - Human MKI67 (Ki67) knockout HeLa cell line (<a href='/en-us/products/cell-lines/human-mki67-ki67-knockout-hela-cell-line-ab255407'>ab255407</a>) at 20 µg

Lane 3:

Western blot - Human MKI67 (Ki67) knockout HeLa cell lysate (<a href='/en-us/products/cell-lysates/human-mki67-ki67-knockout-hela-cell-lysate-ab263762'>ab263762</a>) at 20 µg

Secondary

All lanes:

Western blot - Goat anti-Rabbit IgG H&L (IRDye® 800CW) preadsorbed (<a href='/en-us/products/secondary-antibodies/goat-rabbit-igg-h-l-irdye-800cw-preadsorbed-ab216773'>ab216773</a>) at 1/20000 dilution

Predicted band size: 358 kDa

Observed band size: 124 kDa,359 kDa

false

Key facts

Host species

Rabbit

Clonality

Monoclonal

Clone number

SP6

Isotype

IgG

Carrier free

No

Reacts with

Mouse, Human

Applications

WB, Flow Cyt (Intra), ICC/IF, IHC-P

applications

Immunogen

The exact immunogen used to generate this antibody is proprietary information.

Specificity

ab21700 recognises Ki67.

Reactivity data

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Product details

This product was switched from hybridoma to recombinant format on 25th October 2019.

Patented technology
Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb® patents.

What are the advantages of a recombinant monoclonal antibody?
This product is a recombinant monoclonal antibody, which offers several advantages including:

  • - High batch-to-batch consistency and reproducibility
  • - Improved sensitivity and specificity
  • - Long-term security of supply
  • - Animal-free batch production

For more information, read more on recombinant antibodies.

Properties and storage information

Form
Liquid
Purification technique
Affinity purification Protein A
Storage buffer
pH: 7.6 Preservative: 0.1% Sodium azide Constituents: Tris buffered saline, 1% BSA
Shipped at conditions
Blue Ice
Appropriate short-term storage conditions
+4°C
Appropriate long-term storage conditions
+4°C

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

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.
Biological function summary

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.

Pathways

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.

Product protocols

For this product, it's our understanding that no specific protocols are required. You can visit:

Target data

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.
See full target information MKI67

Publications (42)

Recent publications for all applications. Explore the full list and refine your search

Nature communications 16:7080 PubMed40890128

2025

High-fidelity Cas9-mediated targeting of KRAS driver mutations restrains lung cancer in preclinical models.

Applications

Unspecified application

Species

Unspecified reactive species

Juan Carlos Álvarez-Pérez,Juan Sanjuán-Hidalgo,Alberto M Arenas,Ivan Hernández-Navas,Maria S Benitez-Cantos,Alvaro Andrades,Silvia Calabuig-Fariñas,Eloisa Jantus-Lewintre,Luis Paz-Ares,Irene Ferrer,Pedro P Medina

Liver research 8:259-268 PubMed39958922

2025

Growth differentiation factor 7 alleviates the proliferation and metastasis of hepatocellular carcinoma.

Applications

Unspecified application

Species

Unspecified reactive species

Jianyong Zhuo,Huigang Li,Peiru Zhang,Chiyu He,Wei Shen,Xinyu Yang,Zuyuan Lin,Runzhou Zhuang,Xuyong Wei,Shusen Zheng,Xiao Xu,Di Lu

Oncology letters 29:151 PubMed39898288

2025

MicroRNA‑96 promotes the proliferation and migration of breast cancer cells by inhibiting Smad7 expression.

Applications

Unspecified application

Species

Unspecified reactive species

Xiumei Zhang,Lin Cong,Rong Yu,Qianwen Yu,Xian Hou,Yonghua Zhou

ACS pharmacology & translational science 7:1364-1376 PubMed38751641

2024

Insights into Mechanisms and Promising Triple Negative Breast Cancer Therapeutic Potential for a Water-Soluble Ruthenium Compound.

Applications

Unspecified application

Species

Unspecified reactive species

Nazia Nayeem,Sami Sauma,Afruja Ahad,Rachele Rameau,Sophia Kebadze,Mark Bazett,Brian J Park,Patrizia Casaccia,Swayam Prabha,Karen Hubbard,Maria Contel

Experimental hematology & oncology 13:30 PubMed38468359

2024

Suppression of A-to-I RNA-editing enzyme ADAR1 sensitizes hepatocellular carcinoma cells to oxidative stress through regulating Keap1/Nrf2 pathway.

Applications

Unspecified application

Species

Unspecified reactive species

Houhong Wang,Xiaoyu Wei,Lu Liu,Junfeng Zhang,Heng Li

Cancer immunology, immunotherapy : CII 73:62 PubMed38430249

2024

Mechanism exploration of Zoledronic acid combined with PD-1 in the treatment of hepatocellular carcinoma.

Applications

Unspecified application

Species

Unspecified reactive species

Xinru Fan,Zijun Yan,Yunkai Lin,Qing Wang,Li Jiang,Xiaomeng Yao,Liwei Dong,Lei Chen,Tuan Zhao,Jieqiong Zhao,Heping Hu,Hui Wang

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 10:e2206852 PubMed37083227

2023

Deciphering the Molecular Characteristics of Human Idiopathic Nonobstructive Azoospermia from the Perspective of Germ Cells.

Applications

Unspecified application

Species

Unspecified reactive species

Yidong Chen,Xixi Liu,Li Zhang,Feiyin Zhu,Liying Yan,Wenhao Tang,Zhe Zhang,Qiang Liu,Hui Jiang,Jie Qiao

Translational oncology 31:101639 PubMed36801666

2023

Breast cancer stem cell-derived extracellular vesicles transfer ARRDC1-AS1 to promote breast carcinogenesis via a miR-4731-5p/AKT1 axis-dependent mechanism.

Applications

Unspecified application

Species

Unspecified reactive species

Mingzhu Li,Conglin Lin,Zhibing Cai

Cellular and molecular gastroenterology and hepatology 15:841-867 PubMed36521660

2022

Fibroblast Activation Protein Activates Macrophages and Promotes Parenchymal Liver Inflammation and Fibrosis.

Applications

Unspecified application

Species

Unspecified reactive species

Ai-Ting Yang,Yong-Ook Kim,Xu-Zhen Yan,Hiroyuki Abe,Misbah Aslam,Kyoung-Sook Park,Xin-Yan Zhao,Ji-Dong Jia,Thomas Klein,Hong You,Detlef Schuppan

Journal of orthopaedic surgery and research 17:460 PubMed36266695

2022

LncRNA CASC9 promotes cell proliferation and invasion in osteosarcoma through targeting miR-874-3p/SOX12 axis.

Applications

Unspecified application

Species

Unspecified reactive species

Haiyan Qiu,Di Yang,Xiaolin Li,Fabo Feng
View all publications

Product promise

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