Of all the language used to discuss medical topics, I've found that the language of genomics is most embedded with metaphors. I think this example takes the cake!
"Crash-Test Reveals DNA Traffic Control
Enzymes that copy DNA don’t travel on a lonely highway, but instead ply their trade on crowded interstates. Researchers have discovered that when those DNA-copying machines run head-on into oncoming traffic, they kick the obstacles out of their way. The finding reveals new details about the “rules of the road” that help ensure that cells make accurate copies of their genetic material."
HHMI Investigator: Michael E. O’Donnell, Ph.D., The Rockefeller University
Research published January 29, 2010, in ScienceFor the full news story, please go to http://www.hhmi.org/news/