Protein Laboratories Rehovot Ltd.
March 2018

Certificate of Analysis & Data Sheet

We are the ONLY company producing leptin antagonists and leptins of farm animals including several fish species.

Pegylated human, mouse, rat and ovine leptins and corresponding leptin antagonists are now available!!!

PLR provides a novel service of pegylation of either existing, or provided or custom-made proteins. All PLR's proteins are carrier free (cf) and can be sold in any requested amount !!!
Human Glial-derived Neurotrophic Factor (hGDNF) - Cat no. CYT-12
Description: GDNF promotes the survival and differentiation of dopaminergic neurons in culture, and is able to prevent apoptosis of motor neurons induced by axotomy. The encoded protein is processed to a mature secreted form that exists as a homodimer. The mature form of the protein is a ligand for the product of the RET (rearranged during transfection) protooncogene. In addition to the transcript encoding GDNF, two additional alternative transcripts encoding distinct proteins, referred to as astrocyte-derived trophic factors, have also been described. Mutations in this gene may be associated with Hirschsprung disease. GDNF enhances survival and morphological differentiation of dopaminergic neurons and increases their high-affinity dopamine uptake.
Glial Derived Neurotrophic Factor Human Recombinant produced in E.Coli is a homodimer, non-glycosylated, polypeptide chain containing 2 x 135 amino acids and having a total molecular mass of 30,360 Dalton.
GDNF is purified by proprietary chromatographic techniques.
Source: E.Coli  
Lot Number:  
Quantity Shipped:  
Physical Appearance: Sterile Filtered White lyophilized (freeze-dried) powder.  
Formulation: GDNF was lyophilized after dialysis against 10 mM sodium citrate and 150mM NaCl.
Solubility: It is recommended to reconstitute the lyophilized Glial Derived Neurotrophic Factor in sterile 18MO-cm H2O not less than 100µg/ml, which can then be further diluted to other aqueous solutions containing carrier proteins such as BSA or HSA. 
Stability: Lyophilized Glial Derived Neurotrophic Factor although stable at room temperature for 3 weeks, should be stored desiccated below -18 C. Upon reconstitution GDNF should be stored at 4 C between 2-7 days and for future use below -18 C. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
Please avoid freeze-thaw cycles.
Purity: Greater than 98.0% as determined by:
(a) Analysis by RP-HPLC.
(b) Analysis by SDS-PAGE.
Amino Acid Sequence: The sequence of the first five N-terminal amino acids was determined and was found to be Met-Ser-Pro-Asp-Lys. 
Dimers and Aggregates:  
Biological Activity: The ED50, calculated by the dose-dependant dopamin uptake in rat mesencephalic cultures was found to be 5-10 ng/ml.
Endotoxin: Less than 0.1 ng/µg (IEU/µg) of bPL  
Protein content:  
Usage: PLR's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.  
Date Shipped: