Fully biologically active when compared to standard. The biological activity determined by a chemotaxis bioassay using human B cells is in a concentration range of 1.0-10 ng/ml.
Appearance
Sterile filtered white lyophilized (freeze-dried) powder.
Formulation
Lyophilized from a 0.2 um filtered concentrated solution in 20 mM PB, pH 7.4, 100 mM NaCl.
Endotoxin
Less than 1 EU/ug of rHuBCA-1/CXCL13 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.
Stability and Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.- 12 months from date of receipt, -20 to -70 °C as supplied.- 1 month, 2 to 8 °C under sterile conditions after reconstitution.- 3 months, -20 to -70 °C under sterile conditions after reconstitution.
References
1. Legler DF, Loetscher M, Roos RS, et al. 1998. J Exp Med. 187:655-60.2. Gunn MD, Ngo VN, Ansel KM, et al. 1998. Nature. 391:799-803.3. Ansel KM, Harris RB, Cyster JG. 2002. Immunity. 16:67-76.4. Ansel KM, Ngo VN, Hyman PL, et al. 2000. Nature. 406:309-14.
