Work with LifeSpan to design a custom immunohistochemistry to address your specific biological question. Outsource the entire localization process without having to
worry about finding and characterizing target specific antibodies, sourcing and validating difficult-to-find tissues, and having the ability to interpret the resulting
immunostaining in relation to complex human pathologies.
TCR Screening Services
Test your therapeutic antibodies in immunohistochemistry against a broad panel of normal frozen human tissue types in order to determine potential unintended binding.
Our non-GLP TCR services are designed on the FDA recommendation outlined in their "Points to Consider in the Manufacture and Testing of Monoclonal Antibody Products for Human Use".
Purified / Lyophilized / Biologically Active / Endotoxin Level: Less than 0.1 ng/µg of protein (less than 1EU/µg).
SDF1 / CXCL12
8 kDa (SDS-PAGE)
SDF-1 a and SDF-1 ß, members of the chemokine a subfamily that lack the ELR domain, were initially identified using the signal sequence trap cloning strategy from a mouse bone-marrow stromal cell line. SDF-1 a and SDF-1 ß cDNAs encode precursor proteins of 89 and 93 amino acid residues, respectively. Both SDF-1 a and SDF-1 ß are encoded by a single gene and arise by alternative splicing. The two proteins are identical except for the four amino acid residues that are present in the carboxy-terminus of SDF-1 ß and absent from SDF-1 a. SDF-1/PBSF is highly conserved between species, with only one amino acid substitution between the mature human and mouse proteins. SDF-1/PBSF acts via the chemokine receptor CXCR4 and has been shown to be a chemoattractant for T-lymphocytes, monocytes, pro- and pre-B cells, but not neutrophils. Mice lacking SDF-1 or CXCR4 have been found to have impaired B-lymphopoiesis, myelopoiesis, vascular development, cardiogenesis and abnormal neuronal cell migration and patterning in the central nervous system. Recombinant Mouse SDF-1 a/CXCL12 produced in CHO cells is a polypeptide chain containing 68 amino acids. A fully biologically active molecule, rm SDF-1 ß/CXCL12 has a molecular mass of 8 kDa analyzed by reducing SDS-PAGE and is obtained by chromatographic techniques.
Greater than 95% by SDS-PAGE
The EC50 value of mouse SDF-1 a/CXCL12 on Ca2+ mobilization assay in CHO-K1/Ga15/mCXCR4 cells (human Ga15 and mCXCR4 stably expressed in CHO-K1 cells) is less than 1.5 µg/ml.
Less than 0.2 EU/µg protein (determined by LAL method).
Lyophilized from PBS.
Stable at -80°c for up to 6 months. Upon reconstitution, store at 4°c for up to 1 week or at -20°c for up to 3 months.
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. Also binds to atypical chemokine receptor ACKR3, which activates the beta-arrestin pathway and acts as a scavenger receptor for SDF-1. SDF-1-beta(3-72) and SDF-1-alpha(3-67) show a reduced chemotactic activity.