Species : |
Human |
Source : |
Human |
Tag : |
Non |
Protein Length : |
4-70 a.a. |
Description : |
The somatomedins, or insulin-like growth factors (IGFs), comprise a family of peptides that play important roles in mammalian growth and development. IGF1 mediates many of the growth-promoting effects of growth hormone (GH; MIM 139250). Early studies showed that growth hormone did not directly stimulate the incorporation of sulfate into cartilage, but rather acted through a serum factor, termed "sulfation factor," which later became known as "somatomedin". Three main somatomedins have been characterized: somatomedin C (IGF1), somatomedin A (IGF2; MIM 147470), and somatomedin B (MIM 193190). |
Form : |
The protein was lyophilized after extensive dialysis against 50mM acetic acid buffer. |
Purity : |
Greater than 95.0% as determined by(a) Analysis by RP-HPLC. (b) Analysis by SDS-PAGE. |
Bio-activity : |
The ED50, calculated by the dose-dependant proliferation of murine BALB\C 3T3 cells (measured by 3H-thymidine uptake) is < 1.0 ng/ml, corresponding to a specific activity of 1x106 U/mg. For most in-vitro applications, IGF1 des1-3 exerts its biological activity in the concentration range of 0.2-20 ng/ml. |
Physical Appearance : |
Sterile Filtered White lyophilized (freeze-dried) powder. |
Solubility : |
It is recommended to reconstitute the lyophilized IGF1 Des(1-3) in 100mM Acetic acid not less than 100μg/ml, which can then be further diluted to other aqueous solutions. |
Amino acid sequence : |
The sequence of the first five N-terminal amino acids was determined and was found to be Thr-Leu-Cys-Gly-Ala. |
Storage : |
Lyophilized IGF1 des(1-3) although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution IGF1 des-1-3 should be stored at 4°C between 2-7 days and for future use below -18°C. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA). Please prevent freeze-thaw cycles. |