Seems to promote the survival of visceral and proprioceptive sensory neurons. Recombinant protein corresponding to aa139-257 from human Neurotrophin-3, expressed in E. coli. Molecular Weight: ~13.6kD Biological Activity: The ED50 as determined by its ability to bind Human NTRK2 in functional ELISA is less than 10ug/ml. Amino Acid Sequence: YAEHKSHRGEYSVCDSESLWVTDKSSAIDIRGHQVTVLGEIKTGNSPVKQYFYETRCKEARPVKNGCRGIDDKHWNSQCKTSQTYVRALTSENNKLVGWRWIRIDTSCVCALSRKIGRT Storage and Stability: Lyophilized and reconstituted products are stable for 6 months after receipt at -20C. Reconstitute with sterile ddH2O. Aliquot to avoid repeated freezing and thawing. Store at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.