Catalog Number: C22-105-01B3 Source: Escherichia coli.

Molecular Weight: Approximately 28.8 kDa, a single non-glycosylated polypeptide chain containing 264 amino acids.
Quantity: 5μg/25μg/1000μg
AA Sequence:  GASSGGLGPVVRCEPCDARALAQCAPPPAVCAELVREPGCGCCLTCALSEGQPCGIYTERCG
SGLRCQPSPDEARPLQALLDGRGLCVNASAVSRLRAYLLPAPPAPGNASESEEDRSAGEVESP
SVSSTHRVSDPKFHPLHSKIIIIKKGHAKDSQRYKVDYESQSTDTQNFSSESKRETEYGPCRRE
MEDTLNHLKFLNVLSPRGVHIPNCDKKGFYKKKQCRPSKGRKRGFCWCVDKYGQPLPGYT
TKGKEDVHCYS MQSK
Purity: >98% by SDS-PAGE and HPLC analyses.
Biological Activity: Fully biologically active when compared to standard. The ED50 determined by inhibiting IGF-II
induced proliferation ofserum free human MCF-7 cells is less than 200 ng/ml, corresponding to a
specific activity of ＞ 5.0 × 10^3IU/mg in the presence of 15ng/ml of rHuIGF-II.
Physical Appearance: Sterile Filtered White lyophilized (freeze-dried) powder.
Formulation: Lyophilized from a 0.2μm filtered concentrated solution in PBS, pH 7.4.
Endotoxin: Less than 1EU/μg of rHuIGF-BP3 as determined by LAL method.
Reconstitution: We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the
bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a
concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and
stored at <-20°C. Further dilutions should be made in appropriate buffered solutions.
Storage: This lyophilized preparation is stable at 2-8°C, but should be kept at -20°C for long term storage,
preferably desiccated. Upon reconstitution, the preparation is stable for up to one week at 2-8°C. For
maximal stability, apportion the reconstituted preparation into working aliquots and store at -20°C to
-70°C. Avoid repeated freeze/thaw cycles.

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