产品描述
激活素A是TGF-β家族成员,具有广泛的生物学活性,包括调节细胞增殖和分化,以及促进神经元存活。人类结直肠癌和绝经后妇女中激活素A水平升高分别与结直肠癌和乳腺癌有关。激活素A的生物活性可以被抑制素和可扩散的TGF-β拮抗剂卵泡抑素中和。激活素A与两种形式的激活素受体I型(动作RI-A和动作RI-B)和两种形式(动作RII-A和动作RII-B)结合。激活素是不同β亚基的同源二聚体或异二聚体。它们作为前体蛋白产生,具有氨基末端前肽,该前肽被切割以释放C末端生物活性配体。
本品以冻干粉形式提供,来源于HEK293细胞,高活性、高纯度。重组人/鼠/大鼠激活素A是两条βA链的26.0kDa二硫键同源二聚体,每条含有116个氨基酸残基。
性能参数
表达区间及表达系统(Source) |
Human Activin A Protein is expressed from HEK293 without tag. It contains Gly311-Ser426. |
Accession |
P08476 |
分子量大小(Molecular Weight) |
The protein has a predicted MW of 12.97 kDa. Due to glycosylation, the protein migrates to 14-15 kDa under reduced (R) condition, and 23-25 kDa under Non reducing (N) condition based on Tris-Bis PAGE result. |
内毒素(Endotoxin) |
Less than 0.1EU per μg by the LAL method. |
纯度(Purity) |
> 95% as determined by Tris-Bis PAGE |
活性(Activity) |
Measured by its ability to inhibit proliferation of MPC-11 cells. The ED50 for this effect is < 7 ng/mL. |
制剂(Formulation) |
Lyophilized from 0.22μm filtered solution in 4mM HCI. Normally 8% trehalose is added as protectant before lyophilization. |
储存条件
-25~-15℃保存,收到货之后有效期1年。
复溶后, 2 ~8 °C保存,7天有效期。复溶后, -85~-65℃保存,3个月有效期。
建议首次使用时将蛋白等分,避免重复冻融循环。
复溶方法
开盖之前,先离心。使用4mM HCl复溶至浓度不低于0.1 mg/mL。
注意事项
Ver. CN20240901