The Human NRG1-beta 1 (Neuregulin 1-beta 1) ELISA (Enzyme-Linked Immunosorbent Assay) kit is an in vitro enzyme-linked immunosorbent assay for the quantitative measurement of human NRG1-beta 1 in serum, plasma (collect plasma using EDTA or citrate as an anticoagulant. Heparinized plasma is not recommended. Human NRG1-beta 1 concentration is pretty low in normal serum/plasma, it may not be detected in this assay), cell culture supernatants and urine.