Stromal cell-derived factor-1 beta (SDF-1 β), also calledCXCL12b, is one of two SDF-1 splice variants made by a widevariety of cells upon stimulation by inflammatory cytokines suchas TNF, IL-1, and LPS. SDF-1 β signals through the Gprotein-coupled receptor CXCR4 to recruit activated leukocytes.
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