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Recombinant Human Cardiotrophin-1 (CT-1)

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Product Source Size Cat. No. Price
Recombinant Human Cardiotrophin-1 (CT-1) E. coli10 µg Z102365 $60.00
100 µg Z102367 $300.00
1.0 mg Z102369 $1,200.00
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Data Sheet
Print Version
Alternative Names Recombinant Human Cardiotrophin-1, CTF1, CT1, CT-1
Description Cardiotrophin-1 is a pleiotrophic cytokine and is a member of the IL-6 cytokine family that also includes IL6, IL11, LIF, OSM, CLC and IL31.Full length human CT-1 shares a 79% amino acid sequence identity with murinic CT-1 and both lack a canonical signal sequence. Cardiotrophin-1 interacts with the leukemia inhibitory factor receptor (LIFR) heterodimer and the glycoprotein 130 subunit (gp130) and has the ability to induce cardiac myocyte hypertrophy. It is highly expressed in various skeletal muscles and cardiac tissue, as well as the colon, ovary and prostate, liver, and pancreas, while lower expression levels are found in the lungs, kidney, pancreas, testis, and small intestine.
Gene Symbol CTF1
Gene ID 1489
Accession No. Q16619
Source E. coli
Appearance Lyophilized Powder
Molecular Weight 21.0 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 ED50 is ≤ 0.5 ng/mL as determined by the dose-dependent TF-1 cell proliferation.
Bioactivity Data Click To Enlarge
Formulation Lyophilized from a 0.2 µm filtered solution in PBS
Reconstitution Reconstitute in sterile 20mM Tris, pH 8.0 at 100µg/mL (containing at least 0.1% human or bovine serum albumin). Further dilutions should be made in aqueous buffers supplemented with carrier protein, such as 0.1–1.0% BSA.
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.