The Human SDF-1beta (Stromal cell-derived factor-1 beta) ELISA (Enzyme-Linked Immunosorbent Assay) kit is an in vitro enzyme-linked immunosorbent assay for the quantitative measurement of Human SDF-1beta in serum, plasma (Human SDF-1beta concentration is pretty low in normal serum/plasma, it may not be detected in this assay), cell culture supernatants and urine.