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Recombinant Human DHH

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Product Source Size Cat. No. Price
Recombinant Human DHH E. coli50 µg Z101695 $70.00
250 µg Z101697 $310.00
1.0 mg Z101699 $1,100.00
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Data Sheet
Print Version
Alternative Names Desert Hedgehog Protein, DHH
Recombinant Human Desert Hedgehog (DHH)
Description The Desert Hedgehog protein is one of the three Hedgehog family proteins that is highly conserved and plays a role in many developmental processes in animals. DHH become biologically active following its autocatalytic cleavage. There is a high degree of residue homology between Sonic Hedgehog (SHH), Indian Hedgehog (IHH), and DHH. Despite their individual levels of expression and unique biological roles, the Hedgehog family members all use the same signalling pathway, and therefore, may be used interchangeably for some experimental purposes.
Gene Symbol DHH
Gene ID 50846
Accession No. O43323
Source E. coli
Appearance Lyophilized Powder
Molecular Weight 20.0 kDa
Endotoxin Level <1.0 EU/μg of recombinant protein as determined by the LAL method.
Purity >95% as determined by SDS-PAGE
Gel Image Click To Enlarge
Bioactivity Measured by its ability to induce alkaline phosphatase production by C3H10T1/2 mouse embryonic fibroblast cells. The ED50 for this effect is typically 15­-45 µg/mL
Formulation Lyophilized from a 0.2 μm filtered solution in PBS with 0.2 mM DTT
Reconstitution Reconstitute at 500 μg/mL in sterile PBS
Storage The lyophilized protein is stable for at least one year from date of receipt at -70°C. Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months, with a carrier protein without detectable loss of activity. Avoid repeated freeze/thaw cycles.
Usage For research use only. Not for diagnostic or therapeutic use.
Product Documents
Product References
FAQs
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How are endotoxin levels measured?
1. For estimating the endotoxin levels; we use the LAL (Limulus Amebocyte Lysate) method: The lysate from horseshoe crab amebocytes clots in the presence of very low endotoxin. This reaction is the basis of the Limulus amebocyte lysate (LAL) assay which was approved by the FDA in 1970.

· Endotoxin is generally measured in Endotoxin Units per milliliter (EU/mL).

· For recombinant proteins: EU is reported per microgram of protein.

· One EU = 0.1-0.2 ng endotoxin/µg of protein.

· At abm, we do the LAL chromogenic assays that can detect down to 0.01 EU/ml.
With regard to the BSA levels in some Growth Factors and Cytokines, can you please provide an explanation as to why they are so high?
The amount of BSA, as part of the formulation of a protein, can vary considerably depending on how much BSA was deemed optimum/necessary for protein stability in combination with /in-lieu of - other possible additives. The aforementioned formulations are somewhat analogous to the “carrier” versions of many formulations from “R and D systems” that have as high as 50 µg of BSA per µg of the recombinant protein product. If, needed or desired, abm scientists can substitute BSA for other stabilizing additives for most formulations.
Are your Escherichia coli sourced growth factors: 1) Human derived materials free? 2) Recombinant proteins free?
Yes, all of abm's growth factors made in Escherichia coli using recombinant technology contain no human derived-products or other recombinant proteins. In the rare cases of BSA presence, this will be mentioned in the product's formulation.
What is the amino acid numbering of this protein?
Desert hedgehog protein N-product (residue 24 to 198).