Human CDK8 Antibody

Catalog #: AF6809 Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
AF6809
AF6809-SP

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Human CDK8 Antibody Summary

Species Reactivity

Human

Specificity

Detects human CDK8 in direct ELISAs and Western blots. In direct ELISAs, less than 1% cross-reactivity with recombinant human (rh) CDK2, rhCDK4, and CDK6 is observed.

Source

Polyclonal Sheep IgG

Purification

Antigen Affinity-purified

Immunogen

E. coli-derived recombinant human CDK8
Asn380-Tyr464
Accession # P49336

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Applications

Recommended Concentration

Sample

Immunohistochemistry

5-15 µg/mL

See below

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Immunohistochemistry

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CDK8 in Human Colon. CDK8 was detected in immersion fixed paraffin-embedded sections of human colon using Sheep Anti-Human CDK8 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6809) at 15 µg/mL overnight at 4 °C. Before incubation with the primary antibody, tissue was subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013). Tissue was stained using the Anti-Sheep HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS019) and counterstained with hematoxylin (blue). Specific staining was localized to nuclei of epithelial cells. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Sterile PBS to a final concentration of 0.2 mg/mL.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: CDK8

CDK8 (cyclin-dependent kinase 8; also K35) is a 53-55 kDa member of the CDC2/CDKX subfamily, CMGC Ser/Thr protein kinase family of enzymes. Together with cyclin C, MED12 and MED13, CDK8 forms a "CDK8 module" that contributes to the structure of a four module Mediator complex. CDK8 would appear to have multiple functions. It can block transcription, and the re-initiation of transcription; it can also promote the transcription of thyroid hormone target genes; and it appears to phosphorylate the ICD of Notch, promoting its degradation. Human CDK8 is 464 amino acids (aa) in length. It contains one protein kinase domain (aa 21-335) and two utilized phosphorylation sites at Thr410 and Ser413. There are two potential alternative start sites at Met174 and Met61. Over aa 380-464, human CDK8 shares 98% aa identity with mouse CDK8.

Long Name

Cyclin-dependent Kinase 8

Entrez Gene IDs

1024 (Human); 264064 (Mouse)

Alternate Names

CDK8 protein kinase; CDK8; Cell division protein kinase 8; cyclin-dependent kinase 8; EC 2.7.11; EC 2.7.11.22; EC 2.7.11.23; K35; Mediator complex subunit CDK8; Mediator of RNA polymerase II transcription subunit CDK8; MGC126074; MGC126075; Protein kinase K35