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  3. Ki67/MKI67 Protein, Human (GST)

Ki67/MKI67 is localized on mitotic chromosomes and maintains its dispersion during nuclear envelope disassembly. It covers a large portion of the chromosome surface and prevents chromatin from collapsing into clumps. Ki67/MKI67 Protein, Human (GST) is the recombinant human-derived Ki67/MKI67 protein, expressed by E. coli , with N-GST labeled tag.

For research use only. We do not sell to patients.

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Free Sample   Apply now
5 μg USD 59 In-stock
10 μg USD 100 In-stock
50 μg USD 278 In-stock
100 μg USD 473 In-stock
500 μg USD 992 In-stock
1 mg USD 1588 In-stock
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Description

Ki67/MKI67 is localized on mitotic chromosomes and maintains its dispersion during nuclear envelope disassembly. It covers a large portion of the chromosome surface and prevents chromatin from collapsing into clumps. Ki67/MKI67 Protein, Human (GST) is the recombinant human-derived Ki67/MKI67 protein, expressed by E. coli , with N-GST labeled tag.

Background

The Ki67/MKI67 protein is essential for maintaining the dispersion of individual mitotic chromosomes in the cytoplasm following nuclear envelope disassembly. Positioned on the surface of the mitotic chromosome, specifically within the perichromosomal layer, Ki67/MKI67 covers a significant fraction of the chromosome surface, preventing the collapse of chromosomes into a singular chromatin mass. Functioning as a surfactant with a high net electrical charge, it establishes a steric and electrostatic charge barrier, facilitating independent chromosome motility. Ki67/MKI67 exhibits DNA-binding capabilities, displaying a preference for supercoiled DNA and AT-rich DNA. While it does not contribute to the internal structure of mitotic chromosomes, its role in chromatin organization remains uncertain, raising the possibility that this may be an indirect consequence of its primary function in maintaining dispersed mitotic chromosomes. The protein interacts with various partners, including KIF15, NIFK, PPP1CC, and forms part of a complex involving ZNF335, HCFC1, CCAR2, EMSY, RBBP5, ASH2L, and WDR5, suggesting its involvement in intricate cellular processes and molecular networks.

Species

Human

Source

E. coli

Tag

N-GST

Accession

P46013-1 (M1-P120)

Gene ID
Synonyms
Antigen KI-67; Ki-67; KIA; MIB-1; MKI67; Proliferation Marker Protein Ki-67
AA Sequence

MWPTRRLVTIKRSGVDGPHFPLSLSTCLFGRGIECDIRIQLPVVSKQHCKIEIHEQEAILHNFSSTNPTQVNGSVIDEPVRLKHGDVITIIDRSFRYENESLQNGRKSTEFPRKIREQEP

Molecular Weight

approximately 36.91 kDa

Purity
  • Greater than 95% as determined by reducing SDS-PAGE.
Appearance

Lyophilized powder.

Formulation

Lyophilized from a 0.2 μm filtered solution of 20 mM PB, 150 mM NaCl, pH 7.4.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Storage & Stability

Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation

Ki67/MKI67 Protein, Human (GST) Related Classifications

Help & FAQs
  • How should lyophilized recombinant proteins be reconstituted and stored?

    1. Before opening the cap, centrifuge the vial at 13000 rpm for 20-30 seconds. This step will ensure that any lyophilized powder that may have adhered to the cap or walls is collected at the bottom of the vial, minimizing the risk of product loss. 2. Taking 10 μg as an example, first add 20 μL of reconstituted solution provided by MCE and use a pipette to gently resuspend the lyophilized protein until it is fully dissolved.. (For most proteins, the reconstitution solution we provide is sterile water. If a diluent other than water is required, it will be indicated in the product's Certificate of Analysis (COA).). 3. Add an additional 80 μL of buffer/culture medium containing carrier protein (either 0.1% BSA, 5% HSA, 10% FBS, or 5% trehalose), and then use a pipette to gently mix until uniform. The final concentration is should not be lower than 100 μg/mL. 4. Aliquot at least 20 μL per tube. 5. After aliquoting, store it frozen at a temperature ranging from -20ºC to -80ºC, and it can be preserved for 3 to 6 months.

  • How should solution-form recombinant proteins be stored?

    1. The product can be stored in its original form and diluted as needed upon use. 2. Alternatively, dilute with a buffer/culture medium containing a carrier protein (either 0.1% BSA, 5% HSA, 10% FBS, or 5% alginate), mix well by pipetting, and ensure that

  • Why is it necessary to add carrier proteins?

    Carrier proteins are commonly added to enhance the stability of recombinant proteins, preventing them from adhering to the walls of the container during freezing or thawing processes. Plastic tubes have a certain adsorptive capacity for proteins, which may lead to difficulty in separating the protein from the tube walls, resulting in a decrease in the actual concentration of the protein in the solution and thus affecting its activity. To minimize such losses, it is recommended to add a commonly used carrier protein solution prior to the long-term storage of recombinant protein products.

  • Carrier protein types and options?

    In cases where the carrier protein is not expected to influence the experimental outcomes, an appropriate carrier protein, such as 0.1% BSA (Bovine Serum Albumin), 5% HSA (Human Serum Albumin), 10% FBS (Fetal Bovine Serum), or 5% trehalose, can be incorpo

  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Activity Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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Inquiry Information

Product Name:
Ki67/MKI67 Protein, Human (GST)
Cat. No.:
HY-P72508
Quantity:
MCE Japan Authorized Agent: