• Purity

  >97%, by SDS-PAGE under reducing conditions and visualized by silver stain.

• Endotoxin Level

  <1.0 EU per 1 μg of the protein by the LAL method.  

• Activity

  Measured in a cell proliferation assay using SH‑SY5Y human neuroblastoma cells. The ED    ₅₀ for this effect is 2-12 ng/mL in the presence of Recombinant Human GFR alpha ‑1/GDNF R alpha ‑1 Fc Chimera (Catalog # ).    
  The specific activity of recombinant human GDNF is approximately 3.1 x 10    ³ units/μg, which is calibrated against recombinant human GDNF Reference Standard (NIBSC code: 09/266). Measured by its binding ability in a functional ELISA. Immobilized Recombinant Human GFR alpha ‑1/GDNF R alpha ‑1 Fc Chimera (Catalog # ) at 1 µg/mL can bind Recombinant Human GDNF with an apparent K    _d <1 nM.  

• Source

  Mouse myeloma cell line, NS0-derived Arg109-Ile211

• Accession #

• N-terminal Sequence    
  Analysis

  Arg109

• Structure / Form

  Disulfide-linked homodimer

• Predicted Molecular Mass

  11.6 kDa (monomer)

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

Data Images

Background: GDNF

Glial Cell Line-derived Neurotrophic Factor (GDNF) is a neurotrophic factor that has been shown to promote the survival of various neuronal subpopulations in both the central as well as the peripheral nervous systems at different stages of their development. Neuronal subpopulations that have been shown to be affected by GDNF include motoneurons, midbrain dopaminergic neurons, Purkinje cells and sympathetic neurons.

Native GDNF, a disulfide-linked homodimeric glycoprotein, is a novel member of the TGF-beta  superfamily. Human GDNF cDNA encodes a 211 amino acid residue prepropeptide that is processed to yield a dimeric protein. Mature human GDNF was predicted to contain two 134 amino acid residue subunits. NS0 expressed mature human GDNF lacks 31 residues from the amino-terminus of the predicted sequence. This glycosylated recombinant mature human GDNF still contains the seven conserved Cys residues found in all members of the TGF-beta superfamily and is biologically active. The GDNF sequence contains two potential glycosylation sites and insect cell‑expressed recombinant rat GDNF proteins are glycosylated. Mature rat and human GDNF exhibit approximately 93% amino acid sequence identity and show considerable species cross-reactivity. Cells known to express GDNF include Sertoli cells, type 1 astrocytes, Schwann cells, neurons, pinealocytes and skeletal muscle cells.

• Long Name:

  Glial Cell line-derived Growth Factor

• Entrez Gene IDs:

  2668 (Human); 25453 (Rat)

• Alternate Names:

  Astrocyte-derived trophic factor; ATF; ATF1; ATF2; GDNF; glial cell derived neurotrophic factor; glial cell line derived neurotrophic factor; glial cell line-derived neurotrophic factor; HFB1-GDNF; hGDNF; HSCR3