... have been contaminated with a foreign molecule from mice.
A report released by researchers at the University of California-San Diego and the Salk Institute for Biological Studies says all the human embryonic stem-cell lines approved for use in federally funded research are contaminated with a foreign molecule from mice that may make them risky for use in medical therapies. It puts a kink in the Bush administration's policy that provides funding only for research using embryonic stem-cell lines created before August 2001. And it adds impetus to projects aimed at getting around that roadblock, like the California Institute for Regenerative Medicine, created by California voters in November.
http://www.siliconvalley.com/mld/siliconva...al/10720914.htm
