temperature-sensitive ( ts ) mutants of rat 3y1 fibroblasts representing four separate complementation groups ( 3y1tsd123 , 3y1tsf121 , 3y1tsg125 , and 3y1tsh203 ) are arrested mainly in the g1 phase when cells of randomly proliferating population at 33.8 degrees c are shifted to 39.8 degrees c ( temperature arrest ) .
C0079395
g1 phase
C0007634
cells