tsjt60 cells , a temperature-sensitive g0 mutant of a fischer rat cell line , grew normally in an exponential growth phase at both permissive ( 34 degrees c ) and nonpermissive ( 39.5 degrees c ) temperatures , but when stimulated with fetal bovine serum in the growth-arrested state ( g0 phase ) they entered s phase at 34 degrees c but not at 39.5 degrees c .
C0007634
cells
C0080129
s phase