Human MKI67/Ki67, C-His Tag Protein

Usd: 129 Special Discount

Specification

20μg

50μg

100μg

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Catalog# HA211578

Human MKI67/Ki67, C-His Tag Protein

Product Information

Product name

Human MKI67/Ki67, C-His Tag Protein

Catalog No.

HA211578

Predicted molecular mass

27.5 kD

Protein construction description

A DNA sequence encoding the human MKI67/Ki67 protein (P46013-1) (Gly 1000 -Pro 1234) was expressed with a His tag at the C-terminus.

Accession

P46013-1

Protein construction

MKI67/Ki67 (1000-1234) His

Source

HEK293

Bio Activity

Testing in progress.

Purity

>95% as determined by SDS-PAGE.

Endotoxin

Less than 1.0 EU per μg by the LAL method.

Formulation

Lyophilized from a 0.2 μm filtered solution of PBS, pH7.4, 5% Trehalose, 5% mannitol.

Species

Human

Background

The Ki-67 protein is a nuclear protein doublet, 345-395 kDa, playing a pivotal role in maintaining cell proliferation. Ki-67 is present in all non-G0 phases of the cell cycle. Beginning in the mid G1, the level increases through S and G2 to reach a peak in M. In the end of M, is is rapidly catabolized. The Ki-67 labelling index (LI), i.e., the percentage of cells in a tissue staining for Ki-67, indicates the growth fraction. For many tumours, the rate of cell proliferation as assessed by Ki-67 immunoreactivity correlates with tumour grade and clinical course. In Non-Hodgkin lymphoma a labelling index of less than 20% is seen in low grade lymphomas, greater than 20% is associated with high grade lymphomas. Low grade lymphomas with a labelling index in excess of 5% have a worse prognosis than those with an index of less than 5%. In Burkitt and Burkitt-like lymphoma, nearly 100% of the nuclei are stained. This can be used as a diagnostic criterion. In gliomas the indices ranges from 0% to 5% for low grade astrocytomas while anaplastic astrocytomas and glioblastomas most frequently show an index above 10%. In soft tissue sarcomas Ki-67 index is positively correlated with mitotic count, cellularity and histological grade. In some benign tumours, like meningioma, a high LI is associated with a high recurrence rate. In dysplasia in Barrett's oesophagus and in granulosa cell tumours and ovarian serous tumours, Ki-67 LI is associated with progression. In the former, reproducibility of dysplasia grading is improved when Ki67 is included. In breast cancer, the proliferative index measured by Ki67 immunoreactivity has both prognostic and predictive value.

Usage guide

Shipping

In general, recombinant proteins are provided as lyophilized powder which are shipped with blue ice. Bulk packages of recombinant proteins are provided as frozen liquid which are shipped with dry ice.

Storage

Please avoid repeated freeze-thaw cycles. Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃ It is recommended that aliquot the reconstituted solution to minimize freeze-thaw cycles.

Reconstitution

Reconstitute at 250 μg/ml in sterile water.

Human MKI67/Ki67, C-His Tag Protein

Usd: 129 Special Discount

Specification

Product Information

Product name

Catalog No.

Predicted molecular mass

Protein construction description

Accession

Protein construction

Source

Bio Activity

Purity

Endotoxin

Formulation

Species

Background

Usage guide

Shipping

Storage

Reconstitution

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