Name
Leptin N82K Human Protein
Cat. No.
MAG-2101
Tag/Conjugates
His
Source
Escherichia Coli.
Shipping
At Room Temperature
Description
Pegylated Leptin N82K Human Recombinant produced in E.Coli is a single non-glycosilated polypeptide chain containing 146 amino acids, an additional Ala at N-terminus and one molecule of PEG 20 kDa at its N-terminus acids and having a molecular weight of 35.6kDa. However due to enlarged hydrodymanic volume it runs on the SDS-PAGE as 48 kDa protein and in gel-filtration on Superdex 200 as over 200 kDa protein. Pegylated Leptin N82K Human Recombinant was purified by proprietary chromatographic techniques.
Synonyms
OB Protein, Obesity Protein, OBS, Obesity factor.
Introduction
Leptin takes an important part in the regulation of energy balance and body weight control.After entering the circulation, Leptin binds LEPRwhich results in the activation of several major signalling pathways. In the hypothalamus Leptin acts as an appetite-regulating factor that induces a decrease in food intake and an increase in energy consumption and also regulates bone mass and secretion of hypothalamo-pituitary-adrenal hormones. In the periphery, increases basal metabolism, regulates pancreatic beta-cell function and insulin secretion and affects innate and adaptive immunity.
Physical Appearance
Sterile Filtered White lyophilized (freeze-dried) powder.
Formulation
Lyophilized from a concentrated (0.65mg/ml) solution with 0.003mM NaHCO3 Having 35-40% protein.
Stability
Lyophilized Pegylated Leptin although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution Pegylated Leptin N82K 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.
Purity
Greater than 99.0% as determined by: (a) Gel filtration analysis. (b) Analysis by SDS-PAGE.
Biological Activity
Pegylated Leptin Human is capable of stimulatng proliferation of BAF/3 cells stably transfected with the long form of human leptin receptor. Pegylated Leptin in vitro activity is 5-7 fold lower than the non-pegylated recombinant human leptin but in vivo Pegylated Leptin has profound weight reducing effect (as compared to the non-pegylated recombinant human leptin), resulting mainly from reduced food intake.
Amino acid sequence
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Usage
Mabioway's Co., Ltd 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.
Background
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Solubility
It is recommended to reconstitute the lyophilized Pegylated Leptin in sterile water or 0.4% NaHCO 3 adjusted to pH 8-9, not less than 100µg/ml, which can then be further diluted to other aqueous solutions.
