ScienceDaily (Mar. 27, 2008) — Genes that scientist believe are turned off are actually functioning at a low level that has previously been undetected, a discovery that could help answer questions about chronic disease and aging. Of the about 25,000 human genes science has identified, half are believed to be silent at any particular time and activated only when needed. But Andre Ptitsyn, biomedical and computer expert in the Center for Bioinfomatics at Colorado State University, has discovered that current tools cannot measure extraordinarily low levels of gene expression signals.
