four temperature-sensitive mutants of rat 3y1 fibroblasts belonging to separate complementation groups ( 3y1tsd123 , 3y1tsf121 , 3y1tsg125 , and 3y1tsh203 ) are arrested mainly with a 2c dna content , when cells proliferating at 33.8 degrees c are shifted up to 39.8 degrees c ( ohno et al. , 1984 ) .
C0016030
fibroblasts
C0007634
cells