Recombinant Human Leptin/OB Animal-Free Protein

SDS-Page: Recombinant Human Leptin/OB Animal-Free Protein [NBP2-76247] - 1 ug in each lane (-) non-reducing conditions and (+) reducing conditions in a 4-20% Tris-Glycine gel.

Bioactivity: Recombinant Human Leptin/OB Animal-Free Protein [NBP2-76247] - Leptin/OB induced proliferation of Ba/F3 cells.

Product Discontinued

Recombinant Human Leptin/OB Animal-Free Protein Summary

• Description: For prolonged storage, dilute to working aliquots.
  
  Expiration Date:
  12 months from date of receipt when stored at -20C to-80C as supplied. 1 month when stored at 4C after reconstituting as directed. 3 months when stored at -20C to -80C after reconstituting as directed.
• Specificity: Leptin/OB is a monomer, 16.2 kDa (147 aa)
• Preparation Method: Protein is derived from genetically modified E. coli.
• Details of Functionality: Bioactive protein but no acceptance criteria limits established
• Source: E. coli
• Protein/Peptide Type: Recombinant Protein
• Gene: LEP
• Purity: >95%, by SDS-PAGE
• Endotoxin Note: Acceptance criteria for endotoxin levels are <1 EUs/ug protein (determined by Kinetic LAL Method).

Applications/Dilutions

• Dilutions:
  • Bioactivity
  • SDS-Page
• Application Notes: Lot Specific Information:
  Given endotoxin and ED50 values are acceptance criteria standards. For lot specific values, please contact technical support.
• Theoretical MW: 16.2 kDa.
  Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Packaging, Storage & Formulations

• Storage: Store at -20 to -70C as supplied. After reconstitution, store at 2 to 8C for 1 month and at -20 to -70C for long term storage. Avoid repeated freeze-thaw cycles.
• Buffer: Lyophilized from a sterile (0.2 micron) filtered aqueous solution containing 0.1% Trifluoroacetic Acid (TFA)
• Preservative: No Preservative
• Concentration: LYOPH
• Purity: >95%, by SDS-PAGE
• Reconstitution Instructions: Sterile water at 0.1 mg/mL

Alternate Names for Recombinant Human Leptin/OB Animal-Free Protein

• FLJ94114
• LEP
• leptin (murine obesity homolog)
• leptin (obesity homolog, mouse)
• Leptin
• OB
• Obese protein
• obese, mouse, homolog of
• Obesity factor
• OBOBS

Background

Leptin, the obese (ob) gene product, is a small protein expressed in and secreted from adipose tissue of normal rodents. Studies suggest leptin acts as a circulating hormone capable of regulating body-weight homeostasis and energy balance. One possible target tissue for leptin is the hypothalamus, a proposed control center for satiety and energy expenditure. Ob gene knockout mice are characterized by several metabolic abnormalities including hyperglucocorticoidemia, hyperinsulinemia and insulin resistance, hyperglycemia, altered central nervous system activity, reduced metabolic rate of brown adipose tissue, and a large increase in white adipose tissue. Studies show that the administration of recombinant leptin to ob knockout mice reduces food intake and increases energy expenditure.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Peptides and proteins are guaranteed for 3 months from date of receipt.

Publications for Leptin/OB Recombinant Protein (NBP2-76247)(1)

Publication using NBP2-76247

• Dohnalova L, Lundgren P, Carty JRE, Goldstein N A microbiome-dependent gut-brain pathway regulates motivation for exercise Nature 2022-01-01 [PMID: 36517598] (In vivo assay)

Bioinformatics

• Gene Symbol: LEP