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Human recombinant CD28 ECD protein, AF

Human recombinant CD28 ECD protein, AF

Item no.	BOS-PROTP10747-2-5ug
Manufacturer	Boster
Amount	5 ug
Quantity options	100 ug 20 ug 5 ug
Category	Cell Culture
Format	Lyophilized
Applications	Cell Culture
Specific against	Human (Homo sapiens)
Conjugate/Tag	SUMO, HIS
Sequence	A DNA sequence encoding Human CD28 ECD (# P10747) (Asn19 – Pro152) was expressed with polyhistidine-SUMO tag at the N-terminus.
Alias	TP44
Available
Manufacturer - Category	Recombinant Proteins
Manufacturer - Conjugate / Tag	His-SUMO Tag (N-term)
Storage Conditions	Lyophilized protein should be stored at -20°C for 1 year. Upon reconstitution, store at 2°C to 8°C for up to 1 week. Further dilute in a buffer containing a carrier protein or stabilizer (e.g. 0.1% BSA, 10%FBS, 5%HSA or 5% trehalose solution), protein aliquots should be stored at -20°C or -80°C for 3-6 months. Avoid repeated freeze/thaw cycles.
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).
Manufacturer - Format	The protein was lyophilized from a 0.2 µm filtered solution containing 1X PBS, pH 7.4. If you have any concerns or special requirements, please confirm with us.
Calculated 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).
Gene Name	CD28
Purification	>95% as determined by SDS-PAGE.
Reconstitution	Centrifuge at 3000 rpm for 5 mins before opening. 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 at room temperature for at least 20 mins to ensure sufficient re-dissolved. Do Not Vortex! Vigorous shaking may impair the biological activity of the protein.
Description	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.
Bioactivity/Biological Activity	Testing in process
Endotoxin level	<0.1 EU per 1 μg of the protein by the LAL method.

Note: The presented information and documents (Manual, Product Datasheet, Safety Datasheet and Certificate of Analysis) correspond to our latest update and should serve for orientational purpose only. We do not guarantee the topicality. We would kindly ask you to make a request for specific requirements, if necessary.

All products are intended for research use only (RUO). Not for human, veterinary or therapeutic use.

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BOS-PROTP10747-2-5ug-datasheet.pdf

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Amount: 5 ug

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Delivery expected until 12/4/2025

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