rev: Ocotber 20, 2004
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Murine/Rat Cytokine/Growth Factor/Chemokines Sample Spec sheets (subject to change without notice):
-Leptin (Anti-Obesity Protein) is the protein product of the ob (obese) ene in mice and seems to be involved in appetite control. The ob gene is expressed in adipose tissue and is thought to regulate the body's fat stores. Mice with the ob/ob genotype also develop a form of diabetes similar to type II (non insulin dependent) diabetes. Murine Leptin is a 16 kDa protein containing 147 amino acid residues. -(human leptin also available)
Catalog#: RDI-4531
Package Size: 1 milligram $231.00 $219.00/pack 2 or more
Supplied: Lyophilized powder from solution in 10mM Na Citrate pH 4.0 with
no additives.
Source: E. Coli
Purity: >95% by SDS-Page analysis and N-terminal sequence analysis. Endotoxin
level is less than 0.1ng per ug (1Eu/ug) of murine leptin.
Reconstitution: The lyophilized leptin is poorly soluble at** neutral pH
and WILL NOT dissolve in a phosphate buffer. Reconstitute the protein to
a concentration of less than 5mg/ml using a 5-10mM Na citrate pH4.0 buffer.
Allow to set at least 30 minutes, tighten cap, rotate and mix well. If desired,
can centrifuge for 1-2 minute at 1000rpm to concentrate material in vial.
Once the protein is completely dissolved, the pH can be readjusted to the
physiological range by adding a titrated amount of 1M stock of Tris pH 8.5.
Storage: The lyophilized powder is stable at room temperature but it is best
stored desiccated below 0 Deg C. Reconstituted Leptin should be stored in
working aliquots at -20 DEG C. AVOID FREQUENT FREEZE THAW CYCLES
Reactivity: This murine leptin has been shown to be biologically active in
two different mouse obesity models, ob/ob and NZO. Both strains of mice were
treated via intraperitoneal injection once daily at a dose of 5ug leptin/gm
of body weight for 14 days. Significant effects on body weight, food consumption
and plasma glucose levels were observed to saline treated controls.
AA Sequence:
MVPIQKVQDD TKTLIKTIVT RINDISHTQS VSAKQRVTGL DFIPGLHPIL
SLSKMDQTLA VYQQVLTSLP SQNVLQIAND LENLRDLLHL LAFSKSCSLP
QTSGLQKPES LDGVLEASLY STEVVALSRL QGSLQDILQQ LDVSPEC
Precautions: For In vitro research Use Only. Not for use in or on humans
or animals or for diagnostics.
It is the responsibility of the user to comply with all local/state and Federal
rules in the use of this product. We are not responsible for any patent
infringements that might result with the use of or derivation of this product.
see also leptin
antisera (human/rat/mouse reactive)
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cytokine index)
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