NCIt definition : Human GDNF wild-type allele is located within 5p13.1-p12 and is approximately 24 kb
in length. This allele, which encodes glial cell line-derived neurotrophic factor
protein, is involved in both the survival and differentiation of dopaminergic neurons
and in apoptotic motor neuron protection induced by axotomy. Mutantions in the gene
produce variant alleles that are associated with Hirschsprung disease.;