OB Protein, Obesity Protein, OBS, Obesity factor, Leptin Receptor.
Leptin Receptor is a part of the gp130 family of cytokine receptors that stimulate gene transcription by activating cytosolic STAT proteins. Leptin Receptor plays a role in the regulation of fat metabolism and in novel hematopoietic pathway that is obligatory for normal lymphopoiesis. Leptin Receptorparticipates in the regulation of counter-regulatory response to hypoglycemia by inhibiting neurons of the parabrachial nucleus.Leptin Receptoraffectsspecifically on T lymphocyte responses.
Leptin Binding Domain Human Recombinant also called Leptin Receptor produced in E.Coli is a single, non-glycosylated, polypeptide chain containing 208 amino acids (428-635 a.a) and an additional Ala at N-terminus acids and having a molecular mass of 24.5 kDa.
The Leptin Binding Domain is purified by proprietary chromatographic techniques.
Escherichia Coli.
Sterile Filtered White lyophilized (freeze-dried) powder.
The protein was lyophilized from a concentrated (0.2-0.5mg/ml) solution of Tris-HCl buffer, pH 9.0 with 150 mM NaCl and 10-fold (w/w) excess of glycine.
It is recommended to reconstitute the lyophilized Leptin Receptor in sterile 18MΩ-cm H2O not less than 100µg/ml, which can then be further diluted to other aqueous solutions.
Lyophilized Leptin Receptor although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution Leptin Receptor 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.
Greater than 99.0% as determined by:
(a) Gel filtration analysis.
(b) Analysis by SDS-PAGE.
The sequence of the first six N-terminal amino acids was determined and was found to be Ala-Ile-Asp-Val-Asn-Ile.
Biological Activity is evidenced by high affinity binding of mammalian leptins at 1:1 molar ratio.
Protein quantitation was carried out by UV spectroscopy at 280 nm using the absorbency value of 2.45 as the extinction coefficient for a 0.1% (1mg/ml) solution at pH 9.0. This value is calculated by the PC GENE computer analysis program of protein sequences (IntelliGenetics).
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.
