生物活性

Recombinant Human TGF-α, also known as sarcoma growth factor, TGF-type I and ETGF, is a member of the EGF family of cytokines. TGF-α signals through EGFR and acts synergistically with TGF-beta to promote the proliferation of a wide range of epidermal and epithelial cells. TGF-α is a transforming growth factor that is a ligand for the epidermal growth factor receptor, which activates a signaling pathway for cell proliferation, differentiation and development. This protein may act as either a transmembrane-bound ligand or a soluble ligand. The biological actions of TGF-α and EGF are similar. For instance, TGF-α and EGF bind to the same receptor. When TGF-α binds to EGFR it can initiate multiple cell proliferation events.

ED50 < 0.2ng/ml, measured by Cell Proliferation Assay using BALB/c 3T3 cells, corresponding to a specific activity of ≥ 5 x 106 units/mg.

Sequence: VVSHFNDCPD SHTQFCFHGT CRFLVQEDKP ACVCHSGYVG ARCEHADLLA

Lyophilized recombinant Human TGF-α remains stable up to 6 months at lower than -70°C from date of receipt. Upon reconstitution, Human TGF-α should be stable up to 1 week at 4°C or up to 3 months at -20°C.

化学数据

分子量
分子式
CAS号
纯度	>95%, Endotoxin< 0.2 EU/μg
溶解性（25°C）	Reconstituted in ddH2O or PBS at 100 μg/mL
储存和运输条件	固体粉末： -20°C 冷藏长期储存 常温运输及临时存放

不同实验动物依据体表面积的等效剂量转换表（数据来源于FDA指南）

	小鼠	大鼠	兔	豚鼠	仓鼠	狗
重量 (kg)	0.02	0.15	1.8	0.4	0.08	10
体表面积 (m2)	0.007	0.025	0.15	0.05	0.02	0.5
Km系数	3	6	12	8	5	20

动物 A (mg/kg) = 动物 B (mg/kg) ×	动物 B的Km系数
	动物 A的Km系数

例如，依据体表面积折算法，将化合物用于小鼠的剂量20 mg/kg 换算成大鼠的剂量，需要将20 mg/kg 乘以小鼠的K_m系数（3），再除以大鼠的K_m系数（6），得到化合物用于大鼠的等效剂量为10 mg/kg。