ProSpec-Leptin tA Human

Leptin Antagonist Triple Mutant Human Recombinant is a single non-glycosilated polypeptide chain containing 146 amino and additional Ala at N-terminus acids and having a molecular weight of 16 kDa, Leptin was mutated, resulting in L39A/D40A/F41A. Leptin Antagonist Triple Mutant Human Recombinant was purified by proprietary chromatographic techniques.

Escherichia coli.

White lyophilized powder.

The protein was lyophilized from a concentrated solution with 0.0045mM NaHCO3.

It is recommended to reconstitute the lyophilized Leptin Antagonist Triple Mutant Human Recombinant in sterile 0.4% NaHCO3, not less than 100µg/ml, which can then be further diluted to other aqueous solutions.

Lyophilized Leptin Antagonist Triple Mutant Human Recombinant although stable at room temperature for several weeks, should be stored desiccated below -18°C. Upon reconstitution at > 0.1 mg/ml and up to 2 mg/ml and filter sterilization Leptin 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 is suggested.
Please prevent freeze-thaw cycles.

Greater than 98.0% as determined by:
Gel filtration analysis.
Analysis by -PAGE.

The sequence of the first five N-terminal amino acids was determined and was found to be Ala-Val-Pro-Ile-Gln.

ProSpec’s Leptin triple antagonist 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 quantitation was carried out by UV spectroscopy at 280 nm using the absorbency value of 0.88 as the extinction coefficient for a 0.1% solution at pH 8.0. This value is calculated by the PC GENE computer analysis program of protein sequences .

Title: Leptin-induced vascular smooth muscle cell proliferation via regulating cell cycle, activating ERK1/2 and NF-kB
Publication:  Acta biochimica et biophysica Sinica 42.5 : 325-331.
Link: http://abbs.oxfordjournals.org/content/42/5/325.full

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.