Identical twins reveal epigenetics may play role in disease

Identical twins studies investigating the disease lupus have revealed how environmental factors can influence the activity of specific genes and could cause disease in one sibling and not the other.

Eurekalert: http://www.eurekalert.org/pub_releases/2009-12/cshl-goi121609.php

Journal of Clinical Investigation: http://www.jci.org/articles/view/36666?key=c1d002c27e68d71c8c88