Description

  • Product name

    Recombinant human SDF1 alpha protein
    See all SDF1 alpha proteins and peptides
  • Biological activity

    The specific activity as determined by its ability to chemoattract human peripheral T cells activated with PHA and IL-2 using a concentation of 20-80 ng/ml corresponding to a Specific Activity of 12,500-50,000IU/mg.

  • Purity

    > 95 % SDS-PAGE.
    This protein was purified by proprietary chromatographic techniques. Purity: Greater than 98.0% as determined by: (a) Analysis by RP-HPLC. (b) Analysis by SDS-PAGE.
  • Expression system

    Escherichia coli
  • Accession

  • Protein length

    Full length protein
  • Animal free

    No
  • Nature

    Recombinant
    • Species

      Human
    • Sequence

      The sequence of the first five N-terminal amino acids was determined and was found to be Lys-Pro-Val-Ser-Leu
    • Amino acids

      22 to 89

Associated products

Specifications

Our Abpromise guarantee covers the use of ab73461 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

  • Applications

    Functional Studies

  • Form

    Lyophilised
  • Additional notes

    For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped at 4°C. Upon delivery aliquot. Store at -80°C. Avoid freeze / thaw cycle.

    Preservative: None
    No additives

    This product is an active protein and may elicit a biological response in vivo, handle with caution.

  • Reconstitution
    Reconstitute in sterile 18MOhm/cm water to not less than 100µg/ml, which can then be further diluted to other aqueous solutions.

General Info

  • Alternative names

    • C-X-C motif chemokine 12
    • Chemokine (C-X-C motif) ligand 12
    • cxcl12
    • hIRH
    • hSDF-1
    • Intercrine reduced in hepatomas
    • IRH
    • PBSF
    • Pre-B cell growth-stimulating factor
    • SCYB12
    • SDF 1 alpha
    • SDF-1
    • SDF-1-alpha(3-67)
    • SDF1
    • SDF1_HUMAN
    • SDF1a
    • SDF1B
    • Stromal cell derived factor 1
    • TLSF
    • TPAR1
    see all
  • Function

    Chemoattractant active on T-lymphocytes, monocytes, but not neutrophils. Activates the C-X-C chemokine receptor CXCR4 to induce a rapid and transient rise in the level of intracellular calcium ions and chemotaxis. SDF-1-beta(3-72) and SDF-1-alpha(3-67) show a reduced chemotactic activity. Binding to cell surface proteoglycans seems to inhibit formation of SDF-1-alpha(3-67) and thus to preserve activity on local sites. Acts as a positive regulator of monocyte migration and a negative regulator of monocyte adhesion via the Lyn kinase. Stimulates migration of monocytes through its receptor, CXCR4, and decreases monocyte adherence to surfaces coated with ICAM-1, a ligand for beta-2 integrins. SDF1A/CXCR4 signaling axis inhibits beta-2 integrin LFA-1 mediated adhesion of monocytes to ICAM-1 through Lyn kinase.
  • Sequence similarities

    Belongs to the intercrine alpha (chemokine CxC) family.
  • Post-translational
    modifications

    Processed forms SDF-1-beta(3-72) and SDF-1-alpha(3-67) are produced after secretion by proteolytic cleavage of isoforms Beta and Alpha, respectively. The N-terminal processing is probably achieved by DPP4. Isoform Alpha is first cleaved at the C-terminus to yield a SDF-1-alpha(1-67) intermediate before being processsed at the N-terminus. The C-terminal processing of isoform Alpha is reduced by binding to heparin and, probably, cell surface proteoglycans.
  • Cellular localization

    Secreted.
  • Information by UniProt

References

ab73461 has not yet been referenced specifically in any publications.

Customer reviews and Q&As

Question
Answer

Thank you very much for your call last week and for your patience while I've been in touch with my colleagues regarding your enquiry.
The SDF1 alpha protein, Ab73461, was tested in an activity assay byan outside laboratory, and unfortunately we do not have the specific details about the protocol that was used. The only information that we have is that the lab determinedthe specific activity of 12,500-50,000 IU/mg bythe protein'sability to chemoattract human peripheral T cells activated with PHA and IL-2 using a concentation of 20-80 ng/ml.
I am sorry that we don't have more information at this time, but I hope this will be useful. If you have further questions or if there is anything else that I can do for you, please let me know and I'll be happy to help.

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