CD28 Protein, Human/Cynomolgus/Rhesus macaque, Recombinant (His & Avi)

CD28 is the receptor for CD80 (B7-1) and CD86 (B7-2) proteins.When activated by Toll-like receptor ligands, the CD80 expression is upregulated in antigen presenting cells (APCs). The CD86 expression on antigen presenting cells is constitutive. CD28 is the only B7 receptor constitutively expressed on naive T cells.

Pack Size	Availability	Price/USD
100 μg	5 days	$ 465.00
500 μg	5 days	$ 1,850.00
1 mg	5 days	$ 3,100.00

Pack Size

Availability

Price/USD

Quantity

100 μg

5 days

$ 465.00

500 μg

5 days

$ 1,850.00

1 mg

5 days

$ 3,100.00

Description

Species	Human,Cynomolgus,Rhesus macaque
Expression System	HEK293
Tag	N-His-Avi
Accession Number	P10747-1
Synonyms	CD28 molecule, MGC138290, CD28, CD28 antigen (Tp44)
Construction	Recombinant Human/Cynomolgus/Rhesus macaque CD28 Protein is expressed from HEK293 with His tag and Avi tag at the N-Terminus. It contains Asn19-Pro152.[Accession \|P10747-1]
Protein Purity	> 95% as determined by Tris-Bis PAGE
Molecular Weight	The protein has a predicted MW of 18.2 kDa. Due to glycosylation, the protein migrates to 36-52 kDa based on Tris-Bis PAGE result.

Endotoxin	Less than 1EU per μg by the LAL method.
Formulation	Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.
Reconstitution	Centrifuge the tube before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.
Stability & Storage	-20 to -80°C for 12 months as supplied from date of receipt. -20 to -80°C for 3-6 months in unopened state after reconstitution. 2-8°C for 2-7 days after reconstitution. Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.
Shipping	In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Research Background	CD28 is the receptor for CD80 (B7-1) and CD86 (B7-2) proteins.When activated by Toll-like receptor ligands, the CD80 expression is upregulated in antigen presenting cells (APCs). The CD86 expression on antigen presenting cells is constitutive. CD28 is the only B7 receptor constitutively expressed on naive T cells.