mutants of rat 3y1 fibroblasts , temperature sensitive for proliferation or survival and which represent each of eight complementation groups , were examined to determine whether cells made quiescent at confluence at 33.8 degrees c ( permissive temperature ) can be stimulated to enter s phase at 39.8 degrees c ( nonpermissive temperature ) by 20 % serum or by infection with simian virus 40 ( sv40 ) .
C0016030
fibroblasts
C0007634
cells