| 供货周期： | 一周 |
| 品牌： | |
| 规格： | 20μg/100μg/1mg |
| 货号： | CYT-355 |
| CAS号： |
Leptin tA Rat
Leptin Antagonist Triple Mutant Rat Recombinant
Catalog No. CYT-355
Description:
Leptin Antagonist Triple Mutant Rat Recombinant is a singly non-glycosilated polypeptide chain containing 146 amino and additional Ala at N-terminus acids and having a molecular mass of ~ 16 kDa, Leptin was mutated, resulting in L39A/D40A/F41A mutant. Leptin Antagonist Triple Mutant Rat Recombinant was purified by proprietary chromatographic techniques.
Source:
Escherichia coli.
Physical Appearance:
White lyophilized (freeze-dried) powder.
Formulation:
The protein was lyophilized from a concentrated (0.85mg/ml) solution with 0.003mM NaHCO3.
Solubility:
It is recommended to reconstitute the lyophilized Leptin Antagonist Triple Mutant Rat Recombinant in sterile water or sterile 0.4% NaHCO3adjusted to pH 8-9, not less than 100µg/ml, which can then be further diluted with other aqueous solutions.
Stability:
Lyophilized Leptin-Antagonist Triple Mutant Rat Recombinant although stable at room temperature for several weeks, should be stored desiccated below -18°C. Upon reconstitution at > 0.1 Leptin mutant mg/ml and up to 2 mM and filter sterilization LEP-tA mutant can be stored at 4°C or even room temperature for several weeks making it suitable for long term infusion studies using osmotic pumps. At lower concentration addition of a carrier protein (0.1% HSA or BSA) is suggested.
Please prevent freeze-thaw cycles.
Purity:
Greater than 99.0% as determined by:
(a) Gel filtration analysis.
(b) Analysis by SDS-PAGE.
Amino acid sequence:
The sequence of the first five N-terminal amino acids was determined and was found to be Ala-Val-Pro-Ile-Gln
Biological Activity:
ProSpec’s Leptin Antagonist Triple Mutant Rat Recombinant is capable of inhibiting leptin-induced proliferation of BAF/3 cells stably transfected with the long form of human leptin receptor. It also inhibits various leptin effects in several in vitro bioassays.
Protein content:
Protein quantization was carried out by UV spectroscopy at 280 nm using the absorbency value of 0.21 as the extinction coefficient for a 0.1% (1mg/ml) solution at pH 8.0. This value is calculated by the PC GENE computer analysis program of protein sequences (IntelliGenetics).
Usage:
ProSpec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
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