Name: Rat CD28 Protein (CD8-RM128)
Brand: KactusBio
SKU: CD8-RM128-100UG
Price: 270.0 USD
Availability: InStock

Express System: HEK293
Product Tag: C-His
Purity: > 95% as determined by Bis-Tris PAGE
Activity: The affinity constant of 42.64 uM as determined in SPR assay (Biacore T200). See testing image for detail.
Amino Acid Range: Asn20-Leu150

Catalog #CD8-RM128

Size

100UG

500UG

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Product Description	Recombinant Rat CD28 Protein is expressed from HEK293 with His tag at the C-terminus.It contains Asn20-Leu150.
Product 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.
Product Category	Recombinant Protein / Antibody discovery / Immune checkpoint proteins

Protein	CD28
Synonyms	CD28 antigen (Tp44); CD28 molecule; CD28
Accession	P31042
Species	Rat
Biotinylated	no
Amino Acid Range	Asn20-Leu150
Molecular Weight	The protein has a predicted MW of 16.66 kDa. Due to glycosylation, the protein migrates to 40-55 kDa based on Bis-Tris PAGE result.
Activity	The affinity constant of 42.64 uM as determined in SPR assay (Biacore T200). See testing image for detail.
Product Tag	C-His
Expression System	HEK293
Purity	> 95% as determined by Bis-Tris PAGE
Endotoxin	Less than 1EU per ug by the LAL method.

Form	Lyophilized
Shipping	Shipped at ambient temperature.
Formulation	Lyophilized from 0.22 um 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 ug/ml is recommended. Dissolve the lyophilized protein in distilled water.
Stability And Storage	-20 to -80°C for 12 months as supplied from date of receipt.；-80°C for 3 months after reconstitution.；Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.

	Human B7-1, hFc Tag captured on CM5 Chip via Protein A can bind Rat CD28, His Tag with an affinity constant of 42.64 uM as determined in SPR assay (Biacore T200).
	Rat CD28 on Bis-Tris PAGE under reduced condition. The purity is greater than 95%.