Thermo Fisher Scientific Human Leptin Recombinant Protein

Applications

Tested Dilution

Publications

Western Blot (WB)

Assay-dependent

-

Immunohistochemistry (IHC)

Assay-dependent

-

ELISA (ELISA)

Assay-dependent

-

Control (Ctrl)

Assay-dependent

-

Product Specifications

Species

Human

Expression System

E. coli

Amino acid sequence

Human Leptin recombinant protein contains 147 amino acids

Molecular weight

16 kDa

Class

Recombinant

Type

Protein

Purity

>98% by SDS-PAGE

Endotoxin concentration

<0.1 ng/µg

Activity

Determined active in the ob/ob mouse obesity model. The ob/ob mice were treated via intraperitoneal injection once daily at a dose of 5 µg Leptin/gm of body weight for 7 days. Significant effects on body weight, food consumption, and plasma glucose levels were observed compared to saline-treated controls.

Conjugate

Unconjugated Unconjugated Unconjugated

Form

Lyophilized

Purification

purified

Storage buffer

0.1% TFA

Contains

no preservative

Storage conditions

-20°C

Shipping conditions

Wet ice (domestic); Wet or Dry ice (international)

Product Specific Information

Reconstitution: We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute leptin in sterile, distilled water to a concentration of 1.0-5.0 mg/mL. Do not vortex. This solution can be stored at 2°C to 8°C for up to 1 week. For extended storage, it is recommended to further dilute in a buffer containing a carrier protein, such as 0.1% BSA and store in working aliquots at -20°C to -80°C.

Storage: The lyophilized protein is stable at room temperature for 1 month, but should be kept at -20°C for long term storage. Working aliquots stored with a carrier protein are stable for at least 3 months at -20°C to -80°C. Avoid repeated freeze/thaw cycles.

Target Information

Leptin is a 167 amino acid long protein hormone with important effects in regulating body weight, metabolism and reproductive function. Leptin is approximately 16 kDa in mass and encoded by the obese (ob) gene. Leptin is expressed predominantly by adipocytes, which fits with the idea that body weight is sensed as the total mass of fat in the body. Smaller amounts of leptin are also secreted by cells in the epithelium of the stomach and in the placenta. Leptin receptors are highly expressed in areas of the hypothalamus known to be important in regulating body weight, as well as in T lymphocytes and vascular endothelial cells. Leptin`s effects on body weight are mediated through effects on hypothalamic centers that control feeding behavior and hunger, body temperature and energy expenditure. Leptin is involved in regulating food intake, energy expenditure, and adiposity through hypothalamic leptin receptors. Leptin promotes hematopoiesis, angiogenesis, wound healing, inflammation, immune responses, influences pubertal development and fetal growth. Studies have investigated the role of leptin in obesity, anorexia nervosa, insulin resistance, and hypertension. Leptin also has thermogenic actions and regulates enzymes of fatty acid oxidation. Severe hereditary obesity in rodents and humans can be caused by defects in leptin production.

For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.