Association of down regulated genes with AD and neurodegeneration. The associations between genes or between genes and knowledge term (Alzheimer or Neurodegeneration) are represented as a graph with the frequency indicated by numbers on the links. A red box or line indicates a knowledge term or a link between a gene and a knowledge term, respectively. A blue box and line shows a gene that is associated with both knowledge terms. A black box and line denotes a gene that is associated with only one knowledge term or another gene.