ELISA, Immunogen, SDS-PAGE, WB, Bioactivity testing in progress
Species
Homo sapiens (Human)
Nature
Recombinant
Endotoxin level
Please contact with the lab for this information.
Purity
>90% as determined by SDS-PAGE.
Predicted molecular weight
38.16 kDa
Form
Lyophilized
Storage buffer
Lyophilized from a solution in PBS pH 7.4, 1 mM EDTA, 4% Trehalose, 1% Mannitol.
Please refer to the specific buffer information in the hardcopy of datasheet or the lot-specific COA.
Reconstitution
Reconstitute in sterile water for a stock solution. A copy of datasheet will be provided with the products, please refer to it for details.
Shipping
In general, proteins are provided as lyophilized powder/frozen liquid. They are shipped out with dry ice/blue ice unless customers require otherwise.
Stability and Storage
Use a manual defrost freezer and avoid repeated freeze thaw cycles. Store at 2 to 8°C for frequent use. Store at -20 to -80°C for twelve months from the date of receipt.
Alternate Names
BTF2 p89, Basic transcription factor 2 89 kDa subunit, DNA 3'-5' helicase/translocase XPB, DNA excision repair protein ERCC-3, DNA repair protein complementing XP-B cells, EC:5.6.2.4, ERCC3, General transcription and DNA repair factor IIH helicase/translocase subunit XPB, TFIIH 89 kDa subunit, TFIIH basal transcription factor complex 89 kDa subunit, TFIIH p89, TFIIH subunit XPB, XPB, XPBC, Xeroderma pigmentosum group B-complementing protein
Background
General transcription and DNA repair factor IIH helicase/translocase subunit XPB is a ~89 kDa protein. ATP-dependent 3'-5' DNA helicase/translocase. Binds dsDNA rather than ssDNA, unzipping it in a translocase rather than classical helicase activity. Component of the general transcription and DNA repair factor IIH (TFIIH) core complex. When complexed to CDK-activating kinase (CAK), involved in RNA transcription by RNA polymerase II. The ATPase activity of XPB/ERCC3, but not its helicase activity, is required for DNA opening; it may wrap around the damaged DNA wedging it open, causing localized melting that allows XPD/ERCC2 helicase to anchor.
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