Purity >95% by SDS-PAGE, MW: 30.1 kDa. Glial Derived Neurotrophic Factor comes as a dimer having a 135/270 amino acid chain. Glial cell-derived neurotrophic factor (GDNF) is a neurotrophic factor that signals through a multicomponent receptor system to activate receptor tyrosine kinase RET signaling. GDNF promotes dopamine uptake, prevents motor neuron apoptosis, and supports the survival and differentiation of neurons. This product is produced with no animal or human origin raw products. All processing and handling employs animal free equipment and animal free protocols.