ImClone Systems and Genentech led shares of biotechnology companies higher yesterday after studies showed the medicines they are developing helped cancer patients .
ImClone Systems Inc. and Genentech Inc. led shares of U.S. biotechnology companies higher after medicines they are developing helped cancer patients in studies .
U.S. President George W. Bush said he 's appointed Paul ( Jerry ) Bremer , a security and counter-terrorism expert , as presidential envoy to Iraq .