Quantitative chemiluminescent assay. This assay has high sensitivity and excellent specificity for detection of Glial Cell Line Derived Neurotrophic Factor (GDNF). No significant cross-reactivity or interference between Glial Cell Line Derived Neurotrophic Factor (GDNF) and analogues was observed. Sample types: cell culture supernatants, cerebrospinal fluid, plasma, serum, tissue homogenates. Range: 13.7 - 10000 pg/ml. Precision: Intra-Assay: CV<10% / Inter-Assay: CV<12%. Time: 2.5 hours