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Leptin tA Ovine, PEG/重组绵羊瘦素拮抗剂（三倍突变体）,PEG

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Leptin tA Ovine, PEG/重组绵羊瘦素拮抗剂（三倍突变体）,PEG
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厦门慧嘉生物科技有限公司

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所在地区：福建厦门市

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产品简介

Leptin tA Ovine, PEG/重组绵羊瘦素拮抗剂（三倍突变体）,PEG 产品编号：CYT-703
产品规格：5μg/20μg/1mg

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Leptin tA Ovine, PEG/重组绵羊瘦素拮抗剂（三倍突变体）,PEG

产品编号：CYT-703
产品规格：5μg/20μg/1mg
 

Description Pegylated Leptin Antagonist Triple Mutant Ovine Recombinant is a single non-glycosilated polypeptide chain containing 146 amino and additional Ala at N-terminus acids and having a molecular mass of ~ 35.6 kDa, Leptin was mutated, resulting in L39A/D40A/F41A mutant. However due to enlarged hydrodymanic volume it runs on the SGS-Page as 48 kDa protein and in gel-filtration on Superdex 200 as over 200kDa protein. Leptin Antagonist Triple Mutant Ovine Recombinant Mono-Pegylated with 20kDa PEG and was purified by proprietary chromatographic techniques.
Source Escherichia coli.
Physical Appearance White lyophilized （freeze-dried） powder.
Formulation The protein was lyophilized from a concentrated （0.65mg/ml） solution with 0.003mM NaHCO3.
Solubility It is recommended to reconstitute the lyophilized Leptin-Antagonist Triple Mutant Ovine Recombinant in sterile water or sterile 0.4% NaHCO3 adjusted to pH 8, not less than 100μg/ml, which can then be further diluted to other aqueous solutions.
Stability Lyophilized Leptin Antagonist Triple Mutant Ovine Recombinant although stable at room temperature for several weeks, should be stored desiccated below -18?C. Upon reconstitution at > 0.1 Lep-tA mutant mg/ml and up to 2mM 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 （0.1% HSA or BSA） is suggested. Please prevent freeze-thaw cycles.
Purity Greater than 95.0% as determined by: （a） Gel filtration analysis. （b） Analysis by SDS-PAGE.
Biological Activity Pegylated triple antagonist is capable of inhibiting leptin-induced proliferation of BAF/3 cells stably transfected with the long form of human leptin receptor. Its in vitro activity is 6-8 fold lower than the non-pegylated antagonist but in vivo it has profound weight gain effect （as compared to the non-pegylated antagonist like in mouse leptin antagonists）, resulting mainly from increased food intake.
Protein content Protein quantitation was carried out by UV spectroscopy at 280 nm using the absorbency value of 0.2 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 （InliGenetics）.
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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