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Species of Origin
Human
Expression System
HEK293
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Affinity Tag
His-SUMO Tag (N-term)
Storage Buffer
Lyophilized from a 0.2 µm filtered solution of PBS, pH 7.4.
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Purity
>95% as determined by SDS-PAGE analysis.
Molecular weight
The protein has a calculated MW of 28.61 kDa.
The protein migrates as 48-62 kDa under reducing condition (SDS-PAGE analysis). -
Endotoxin Level
<1 EU per 1 μg of the protein by the LAL method.
Form
Lyophilized
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Specifications
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Background
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Background
CD28, a well-known costimulatory receptor expressed on T cells, is a type I transmembrane glycoprotein of the Ig superfamily. When the T cells receive the first signal delivered by APCs (antigen-presenting cells), it initiates signaling cascades, which favor T cell survival and proliferation. It has been demonstrated that patients with lung cancer who responded to PD-1 therapy had more CD28+ T cells, suggesting that CD28 may predict treatment response.
Synonyms
TP44
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Uniprot ID
# P10747
Sequence Note
Asn19-Pro152
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Instruction
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Reconstitution
It is recommended to reconstitute the lyophilized protein in sterile H₂O to a concentration not less than 200 μg/mL and incubate the stock solution for at least 20 min to ensure sufficient re-dissolved.
Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at -20°C or lower for long term storage.
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Stability & Storage
This product is stable after storage at:
- -20°C for 12 months in lyophilized state from date of receipt.
- -20°C or -80°C for 1 month under sterile conditions after reconstitution.
Avoid repeated freeze/thaw cycles.
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Image
![SDS-PAGE analysis of Human CD28 ECD.]()
SDS-PAGE analysis of Human CD28 ECD.
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Datasheet & Documents
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Disclaimer：For Research Use or Further Manufacturing Only.
