Ki-67 is a nuclear protein, which is expressed in the proliferating cells. Ki-67 is preferentially expressed during late G1-, S-, M-, and G2-phases of the cell cycle, while cells in the G0 (quiescent) phase are negative for this protein.
The gene marker of proliferation Ki-67 (MKI67), spanning 15 exons, is mapped to human chromosome 10q26.2. The encoded protein contains phosphopeptide-binding forkhead-associated (FHA) domain and a protein phosphatase 1 (PP1)-binding site at N- terminal. It possesses 16 tandem repeats at central region and leucine and arginine (LR) pairs at C- terminal end.
Immunogen
Synthetic peptide from C-terminus of human Ki-67 protein.
Application
Anti-KI-67 antibody, Rabbit monoclonal has been used in immunohistochemistry.
Biochem/physiol Actions
Marker of proliferation Ki-67 (MKI67), which is a part of the mitotic chromosome periphery, functions as a biological surfactant to maintain individual mitotic chromosomes dispersed in the cytoplasm after nuclear envelope disassembly. Ki-67 is a vital prognostic marker in breast and prostate cancer. Expression of the encoded protein is associated with cell-proliferation rate. Ki-67 is expressed at all active phases of the cell cycle (G (1), S, G (2), and mitosis), except resting cells (G (0)). Therefore, this protein is considered to be a potent cell proliferation marker.
Features and Benefits
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Physical form
0.1 ml rabbit monoclonal antibody supplied as tissue culture supernatant in TBS/1% BSA buffer pH 7.5 with less than 0.1% sodium azide.
Disclaimer
Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
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The Ki?67 protein: from the known and the unknown.
Scholzen T and Johannes G
Journal of Cellular Physiology, 182(3), 311-322 (2000)
Ki-67 is a prognostic parameter in breast cancer patients: results of a large population-based cohort of a cancer registry.
Inwald E C, et al.
Breast Cancer Research and Treatment, 139(2), 539-552 (2013)
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