Stromal-Cell Derived Factor-1 beta (SDF-1ß), also known as SCYB12, PBSF and CXCL12, is an 8.3 kDa, heparin-binding member of the CXC (or alpha) family of chemokines and signal through the CXCR4 receptor. SDF-1a and ß are reported to be monomers at neutral pH and physiologic ionic strength, On the...