蛋白别名（Synonyms）

CD28 antigen (Tp44); CD28 molecule; CD28

种属（Species)

Rat

表达系统（Source）

HEK293

表达序列（Sequence）

Asn20-Leu150

Accession

P31042

标签（Tag)

C-His

分子量（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.

内毒素（Endotoxin）

Less than 1EU per μg by the LAL method.

纯度（Purity）

> 95% as determined by Bis-Tris PAGE

活性（Activity）

SPR Data: 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 米M as determined in SPR assay .

制剂（Formulation）

Lyophilized from 0.22 μm filtered solution in PBS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.

外观（Appearance）

冻干粉